chore(dependency): upgrade kotlin to 1.5.32

[j-sandy]

Upgrade kotlin from 1.4.0 to 1.5.32, in order to sync with spring boot 2.5.15.
https://repo1.maven.org/maven2/org/springframework/boot/spring-boot-dependencies/2.5.15/spring-boot-dependencies-2.5.15.pom

Upgrade kotlinx-coroutines-bom to 1.5.2, in order to sync with kotlin 1.5.x.
https://repo1.maven.org/maven2/org/jetbrains/kotlinx/kotlinx-coroutines-core-jvm/1.5.2/kotlinx-coroutines-core-jvm-1.5.2.pom

While upgrading kotlin 1.5.32, encounter below errors in kork-plugins module:

Unstarted application context org.springframework.boot.test.context.assertj.AssertableApplicationContext[startupFailure=org.springframework.beans.factory.parsing.BeanDefinitionParsingException] failed to start
java.lang.IllegalStateException: Unstarted application context org.springframework.boot.test.context.assertj.AssertableApplicationContext[startupFailure=org.springframework.beans.factory.parsing.BeanDefinitionParsingException] failed to start
	at org.springframework.boot.test.context.assertj.AssertProviderApplicationContextInvocationHandler.getStartedApplicationContext(AssertProviderApplicationContextInvocationHandler.java:156)
	at org.springframework.boot.test.context.assertj.AssertProviderApplicationContextInvocationHandler.invokeApplicationContextMethod(AssertProviderApplicationContextInvocationHandler.java:147)
	at org.springframework.boot.test.context.assertj.AssertProviderApplicationContextInvocationHandler.invoke(AssertProviderApplicationContextInvocationHandler.java:85)
	at com.sun.proxy.$Proxy68.getBeansOfType(Unknown Source)
	at com.netflix.spinnaker.kork.plugins.PluginSecretTest$tests$1$2.invoke$lambda-0(PluginSecretTest.kt:46)
	...
Caused by: org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: @Configuration class 'PluginSecretTest.TestSecretEngineConfiguration' may not be final. Remove the final modifier to continue.
Offending resource: com.netflix.spinnaker.kork.plugins.PluginSecretTest$TestSecretEngineConfiguration
	at app//org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:72)
	at app//org.springframework.context.annotation.ConfigurationClass.validate(ConfigurationClass.java:217)
	at app//org.springframework.context.annotation.ConfigurationClassParser.validate(ConfigurationClassParser.java:215)

Unstarted application context org.springframework.boot.test.context.assertj.AssertableApplicationContext[startupFailure=org.springframework.beans.factory.parsing.BeanDefinitionParsingException] failed to start
java.lang.IllegalStateException: Unstarted application context org.springframework.boot.test.context.assertj.AssertableApplicationContext[startupFailure=org.springframework.beans.factory.parsing.BeanDefinitionParsingException] failed to start
	at org.springframework.boot.test.context.assertj.AssertProviderApplicationContextInvocationHandler.getStartedApplicationContext(AssertProviderApplicationContextInvocationHandler.java:156)
	at org.springframework.boot.test.context.assertj.AssertProviderApplicationContextInvocationHandler.invokeApplicationContextMethod(AssertProviderApplicationContextInvocationHandler.java:147)
	at org.springframework.boot.test.context.assertj.AssertProviderApplicationContextInvocationHandler.invoke(AssertProviderApplicationContextInvocationHandler.java:85)
	at com.sun.proxy.$Proxy68.getBean(Unknown Source)
	at com.netflix.spinnaker.kork.plugins.v2.scenarios.ComplexInjectionScenarioTest$tests$1$2.invoke$lambda-0(ComplexInjectionScenarioTest.kt:55)
	...
Caused by: org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: @Configuration class 'ComplexInjectionScenarioTest.ComplexInjectionTestConfiguration' may not be final. Remove the final modifier to continue.
Offending resource: com.netflix.spinnaker.kork.plugins.v2.scenarios.ComplexInjectionScenarioTest$ComplexInjectionTestConfiguration
	at app//org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:72)
	at app//org.springframework.context.annotation.ConfigurationClass.validate(ConfigurationClass.java:217)
	at app//org.springframework.context.annotation.ConfigurationClassParser.validate(ConfigurationClassParser.java:215)

Unstarted application context org.springframework.boot.test.context.assertj.AssertableApplicationContext[startupFailure=org.springframework.beans.factory.parsing.BeanDefinitionParsingException] failed to start
java.lang.IllegalStateException: Unstarted application context org.springframework.boot.test.context.assertj.AssertableApplicationContext[startupFailure=org.springframework.beans.factory.parsing.BeanDefinitionParsingException] failed to start
	at org.springframework.boot.test.context.assertj.AssertProviderApplicationContextInvocationHandler.getStartedApplicationContext(AssertProviderApplicationContextInvocationHandler.java:156)
	at org.springframework.boot.test.context.assertj.AssertProviderApplicationContextInvocationHandler.invokeApplicationContextMethod(AssertProviderApplicationContextInvocationHandler.java:147)
	at org.springframework.boot.test.context.assertj.AssertProviderApplicationContextInvocationHandler.invoke(AssertProviderApplicationContextInvocationHandler.java:85)
	at com.sun.proxy.$Proxy68.getBean(Unknown Source)
	at com.netflix.spinnaker.kork.plugins.v2.scenarios.ServiceDependenciesScenarioTest$tests$1$2.invoke$lambda-0(ServiceDependenciesScenarioTest.kt:49)
	...
Caused by: org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: @Configuration class 'ServiceDependenciesScenarioTest.TestApplicationConfiguration' may not be final. Remove the final modifier to continue.
Offending resource: com.netflix.spinnaker.kork.plugins.v2.scenarios.ServiceDependenciesScenarioTest$TestApplicationConfiguration
	at app//org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:72)
	at app//org.springframework.context.annotation.ConfigurationClass.validate(ConfigurationClass.java:217)
	at app//org.springframework.context.annotation.ConfigurationClassParser.validate(ConfigurationClassParser.java:215)

Unstarted application context org.springframework.boot.test.context.assertj.AssertableApplicationContext[startupFailure=org.springframework.beans.factory.parsing.BeanDefinitionParsingException] failed to start
java.lang.IllegalStateException: Unstarted application context org.springframework.boot.test.context.assertj.AssertableApplicationContext[startupFailure=org.springframework.beans.factory.parsing.BeanDefinitionParsingException] failed to start
	at org.springframework.boot.test.context.assertj.AssertProviderApplicationContextInvocationHandler.getStartedApplicationContext(AssertProviderApplicationContextInvocationHandler.java:156)
	at org.springframework.boot.test.context.assertj.AssertProviderApplicationContextInvocationHandler.invokeApplicationContextMethod(AssertProviderApplicationContextInvocationHandler.java:147)
	at org.springframework.boot.test.context.assertj.AssertProviderApplicationContextInvocationHandler.invoke(AssertProviderApplicationContextInvocationHandler.java:85)
	at com.sun.proxy.$Proxy68.getBean(Unknown Source)
	at com.netflix.spinnaker.kork.plugins.v2.scenarios.ServiceInjectionScenarioTest$tests$1$2.invoke$lambda-0(ServiceInjectionScenarioTest.kt:48)
	...
Caused by: org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: @Configuration class 'ServiceInjectionScenarioTest.ServiceInjectionTestConfiguration' may not be final. Remove the final modifier to continue.
Offending resource: com.netflix.spinnaker.kork.plugins.v2.scenarios.ServiceInjectionScenarioTest$ServiceInjectionTestConfiguration
	at app//org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:72)
	at app//org.springframework.context.annotation.ConfigurationClass.validate(ConfigurationClass.java:217)
	at app//org.springframework.context.annotation.ConfigurationClassParser.validate(ConfigurationClassParser.java:215)

To fix these errors make Configuration classes as generic scope by removing private.