Add e2e tests for Spring 7 sample

[adinauer]

#skip-changelog

📜 Description

Add e2e tests for Spring 7 sample

💡 Motivation and Context

More coverage

💚 How did you test it?

📝 Checklist

• I added GH Issue ID & Linear ID
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against fab72c4

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	396.52 ms	507.74 ms	111.22 ms
Size	1.58 MiB	2.10 MiB	533.40 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
c8125f3	397.65 ms	485.14 ms	87.49 ms
ee747ae	386.94 ms	431.43 ms	44.49 ms
23d6b12	354.10 ms	408.38 ms	54.28 ms
d217708	409.83 ms	474.72 ms	64.89 ms
d217708	411.22 ms	430.86 ms	19.63 ms
ee747ae	400.46 ms	423.61 ms	23.15 ms
17a0955	372.53 ms	446.70 ms	74.17 ms
3d205d0	352.15 ms	432.53 ms	80.38 ms
1df7eb6	397.04 ms	429.64 ms	32.60 ms
b750b96	408.98 ms	480.32 ms	71.34 ms

App size

Revision	Plain	With Sentry	Diff
c8125f3	1.58 MiB	2.10 MiB	532.32 KiB
ee747ae	1.58 MiB	2.10 MiB	530.95 KiB
23d6b12	1.58 MiB	2.10 MiB	532.31 KiB
d217708	1.58 MiB	2.10 MiB	532.97 KiB
d217708	1.58 MiB	2.10 MiB	532.97 KiB
ee747ae	1.58 MiB	2.10 MiB	530.95 KiB
17a0955	1.58 MiB	2.10 MiB	533.20 KiB
3d205d0	1.58 MiB	2.10 MiB	532.97 KiB
1df7eb6	1.58 MiB	2.10 MiB	532.97 KiB
b750b96	1.58 MiB	2.10 MiB	533.19 KiB

Previous results on branch: feat/spring-7-e2e-test

Startup times

Revision	Plain	With Sentry	Diff
5ced2b7	382.73 ms	414.15 ms	31.41 ms

App size

Revision	Plain	With Sentry	Diff
5ced2b7	1.58 MiB	2.10 MiB	532.97 KiB

[cursor]

Bug: JUnit 5 Tests Fail Without Platform Configuration

The global useJUnitPlatform() configuration was removed, but it's required for JUnit 5 tests to run. Both the test and systemTest tasks are missing this configuration, which prevents JUnit 5 tests from executing properly.