Generate a temporary uber-jar in case the target already exists instead of deleting it right away

[aloubyansky]

Currently, before generating the runner JAR, we are checking if it already exists and deleting it. In case quarkus.package.add-runner-suffix=false, the uber-jar file name will (typically) be matching the original JAR name. The issue is that the original JAR is used as a content source for the uber-jar. If the original JAR is deleted before the uber-jar is generated than generated uber-jar won't be usable.

[quarkus-bot]

Failing Jobs - Building 6d19452

Status	Name	Step	Failures	Logs	Raw logs
✔️	JVM Tests - JDK 11
✖	JVM Tests - JDK 17	Build	Failures	Logs	Raw logs
✖	JVM Tests - JDK 17 MacOS M1	Build	Failures	Logs	Raw logs
✔️	JVM Tests - JDK 18

Full information is available in the Build summary check run.

Failures

⚙️ JVM Tests - JDK 17 #

- Failing: integration-tests/reactive-messaging-hibernate-orm 

📦 integration-tests/reactive-messaging-hibernate-orm

✖ io.quarkus.it.kafka.KafkaConnectorTest.testFruits line 50 - More details - Source on GitHub

org.awaitility.core.ConditionTimeoutException: Assertion condition defined as a io.quarkus.it.kafka.KafkaConnectorTest expected: <6> but was: <3> within 10 seconds.
	at org.awaitility.core.ConditionAwaiter.await(ConditionAwaiter.java:167)
	at org.awaitility.core.AssertionCondition.await(AssertionCondition.java:119)

---

⚙️ JVM Tests - JDK 17 MacOS M1 #

- Failing: integration-tests/mailer integration-tests/smallrye-opentracing 

📦 integration-tests/mailer

✖ io.quarkus.it.mailer.MailerTest.sendHtmlEmail - More details - Source on GitHub

java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
	at io.quarkus.test.junit.QuarkusTestExtension.throwBootFailureException(QuarkusTestExtension.java:625)
	at io.quarkus.test.junit.QuarkusTestExtension.interceptTestClassConstructor(QuarkusTestExtension.java:696)

📦 integration-tests/smallrye-opentracing

✖ io.quarkus.it.opentracing.OpenTracingTestCase. line 35 - More details - Source on GitHub

java.lang.IllegalStateException: Could not find a valid Docker environment. Please see logs and check configuration
	at org.testcontainers.dockerclient.DockerClientProviderStrategy.lambda$getFirstValidStrategy$7(DockerClientProviderStrategy.java:256)
	at java.base/java.util.Optional.orElseThrow(Optional.java:403)