Fix handling missing Spring Security on classpath on Java 8.

[maciejwalkowiak]

📜 Description

Fix handling missing Spring Security on classpath on Java 8.

💡 Motivation and Context

@ConditionalOnClass placed on methods ends up with an exception when used with Java 8. This behavior does not exist with Java 11+.

Fixes #1543
Fixes #1546

💚 How did you test it?

This bug is related with how classes are loaded, and the test with filtered class does not exactly reproduces the issue. To reproduce this issue we would need to add a separate Gradle module that has no Spring Security on the classpath. Not sure if it's worth it.

📝 Checklist

• I reviewed the submitted code
• I added tests to verify the changes
• I updated the docs if needed
• No breaking changes

[codecov-commenter]

Codecov Report

Merging #1552 (718520a) into main (1cdf98b) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 718520a differs from pull request most recent head f762acb. Consider uploading reports for the commit f762acb to get more accurate results

@@            Coverage Diff            @@
##               main    #1552   +/-   ##
=========================================
  Coverage     76.01%   76.01%           
  Complexity     1944     1944           
=========================================
  Files           192      192           
  Lines          6725     6726    +1     
  Branches        670      670           
=========================================
+ Hits           5112     5113    +1     
  Misses         1287     1287           
  Partials        326      326           

Impacted Files	Coverage Δ
...io/sentry/spring/boot/SentryAutoConfiguration.java	98.21% <100.00%> (+0.03%)	⬆️

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[marandaneto]

@maciejwalkowiak

To reproduce this issue we would need to add a separate Gradle module that has no Spring Security on the classpath. Not sure if it's worth it.

yeah don't think so, otherwise we'd need a new gradle module for everything that loads at runtime.
a way around it would be using Gradle fixtures, https://github.com/getsentry/sentry-android-gradle-plugin/tree/main/plugin-build/src/test/resources/testFixtures/appTestProject

and then you can do things like this: https://github.com/getsentry/sentry-android-gradle-plugin/blob/main/plugin-build/src/test/kotlin/io/sentry/android/gradle/SentryPluginTest.kt#L32-L88

but not worth it either I guess, unless this type of problem happens again.