Add backend e2e tests

[adinauer]

#skip-changelog

📜 Description

Add some end to end tests for backend.

💡 Motivation and Context

To catch breaking changes early.

💚 How did you test it?

;-)

📝 Checklist

• I reviewed the submitted code.
• 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.
• 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 51a1121

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	390.16 ms	466.50 ms	76.34 ms
Size	1.70 MiB	2.27 MiB	583.82 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
1f3652d	361.62 ms	424.76 ms	63.14 ms
86f0096	381.33 ms	476.58 ms	95.25 ms
c7e2fbc	393.98 ms	478.24 ms	84.27 ms
e6ffd7b	379.52 ms	449.30 ms	69.78 ms
0bd723b	412.52 ms	496.65 ms	84.13 ms
3d8bd2b	375.34 ms	446.32 ms	70.98 ms
4e260b3	384.08 ms	477.56 ms	93.48 ms
9119d59	407.12 ms	509.64 ms	102.52 ms
4e29063	376.38 ms	390.98 ms	14.60 ms
0bd723b	375.20 ms	452.41 ms	77.20 ms

App size

Revision	Plain	With Sentry	Diff
1f3652d	1.72 MiB	2.27 MiB	554.95 KiB
86f0096	1.72 MiB	2.29 MiB	576.50 KiB
c7e2fbc	1.72 MiB	2.29 MiB	576.40 KiB
e6ffd7b	1.72 MiB	2.29 MiB	579.13 KiB
0bd723b	1.72 MiB	2.29 MiB	578.09 KiB
3d8bd2b	1.72 MiB	2.29 MiB	577.53 KiB
4e260b3	1.72 MiB	2.27 MiB	554.95 KiB
9119d59	1.70 MiB	2.27 MiB	583.84 KiB
4e29063	1.72 MiB	2.29 MiB	578.38 KiB
0bd723b	1.72 MiB	2.29 MiB	578.09 KiB

Previous results on branch: feat/backend-e2e-tests

Startup times

Revision	Plain	With Sentry	Diff
eaea817	390.43 ms	461.30 ms	70.87 ms
b87fb2b	448.86 ms	531.02 ms	82.16 ms
6fb3a13	398.49 ms	436.70 ms	38.21 ms
06c4443	407.92 ms	485.69 ms	77.77 ms
1959d29	408.73 ms	486.68 ms	77.95 ms
fba097d	440.16 ms	511.28 ms	71.12 ms
df6f13d	456.69 ms	538.70 ms	82.01 ms
922dd4a	442.44 ms	496.39 ms	53.95 ms
02d7b93	395.77 ms	474.56 ms	78.79 ms
5a3dcb4	376.96 ms	443.90 ms	66.94 ms

App size

Revision	Plain	With Sentry	Diff
eaea817	1.70 MiB	2.27 MiB	583.84 KiB
b87fb2b	1.72 MiB	2.27 MiB	558.56 KiB
6fb3a13	1.72 MiB	2.27 MiB	558.56 KiB
06c4443	1.72 MiB	2.27 MiB	558.42 KiB
1959d29	1.72 MiB	2.27 MiB	558.56 KiB
fba097d	1.72 MiB	2.27 MiB	558.56 KiB
df6f13d	1.72 MiB	2.27 MiB	558.56 KiB
922dd4a	1.72 MiB	2.27 MiB	558.56 KiB
02d7b93	1.70 MiB	2.27 MiB	583.82 KiB
5a3dcb4	1.72 MiB	2.27 MiB	558.30 KiB

[romtsn]

a few minor things and I didn't check the test code, only configs and gradle files, but LGTM otherwise 🚢

[adinauer]

Actuator has only been added to one of the sample projects and should be there for all so the ...wait for spring ... script doesn't wait the full duration but stops when the server is ready.

[adinauer]

JUNIT test reports seem to override each other

[lbloder]

LGTM 👍