test(tracing): Update performance tests for JS Core V8

[krystofwoldrich]

📢 Type of change

• Refactoring

📜 Description

This PR refactors the tracing/performance tests using the public APIs, which are planned to change minimally in the next major (client, startSpan, ...).

The React Navigation V4 Instrumentation is not updated, as it will likely be removed in the next major.

💡 Motivation and Context

This PR contains the JS Core V8 upgrade.

• feat(core): Bump sentry-javascript to version 8 #3736

💚 How did you test it?

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled
• All tests passing
• No breaking changes

🔮 Next steps

#skip-changelog

[github-actions]

Android (legacy) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	488.24 ms	556.88 ms	68.63 ms
Size	17.73 MiB	19.94 MiB	2.20 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
d197b5c+dirty	338.94 ms	354.87 ms	15.93 ms
6e8584e	447.10 ms	474.71 ms	27.61 ms
dadc233+dirty	333.78 ms	343.94 ms	10.16 ms
2534337	394.15 ms	415.12 ms	20.97 ms
f06c879	408.41 ms	424.54 ms	16.13 ms
15c80ab+dirty	336.27 ms	350.58 ms	14.31 ms
76d1baf+dirty	335.72 ms	355.52 ms	19.80 ms
9c48b2c	349.24 ms	385.96 ms	36.72 ms
0677344	327.74 ms	337.14 ms	9.40 ms
5446992	403.40 ms	426.70 ms	23.30 ms

App size

Revision	Plain	With Sentry	Diff
d197b5c+dirty	17.73 MiB	20.04 MiB	2.31 MiB
6e8584e	17.73 MiB	19.86 MiB	2.12 MiB
dadc233+dirty	17.73 MiB	19.75 MiB	2.02 MiB
2534337	17.73 MiB	19.84 MiB	2.11 MiB
f06c879	17.73 MiB	19.85 MiB	2.12 MiB
15c80ab+dirty	17.73 MiB	20.04 MiB	2.31 MiB
76d1baf+dirty	17.73 MiB	20.04 MiB	2.31 MiB
9c48b2c	17.73 MiB	19.80 MiB	2.07 MiB
0677344	17.73 MiB	19.81 MiB	2.07 MiB
5446992	17.73 MiB	19.85 MiB	2.12 MiB

[github-actions]

Android (new) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	359.04 ms	412.78 ms	53.73 ms
Size	7.15 MiB	8.21 MiB	1.06 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
f06c879+dirty	361.27 ms	407.88 ms	46.61 ms
d197b5c+dirty	258.75 ms	313.61 ms	54.86 ms
1d86dd6+dirty	335.76 ms	371.22 ms	35.46 ms
dadc233+dirty	363.19 ms	370.37 ms	7.18 ms
728164b+dirty	335.93 ms	342.94 ms	7.01 ms
e2b64fe+dirty	258.82 ms	304.26 ms	45.44 ms
0db0c72+dirty	335.20 ms	351.06 ms	15.86 ms
d361d38+dirty	257.72 ms	318.76 ms	61.04 ms
ad6c299+dirty	336.47 ms	362.89 ms	26.42 ms
27ef4ee+dirty	296.71 ms	351.00 ms	54.29 ms

App size

Revision	Plain	With Sentry	Diff
f06c879+dirty	7.15 MiB	8.12 MiB	997.78 KiB
d197b5c+dirty	7.15 MiB	8.09 MiB	962.72 KiB
1d86dd6+dirty	7.15 MiB	8.13 MiB	1002.18 KiB
dadc233+dirty	7.15 MiB	8.04 MiB	910.84 KiB
728164b+dirty	7.15 MiB	8.12 MiB	997.71 KiB
e2b64fe+dirty	7.15 MiB	8.07 MiB	947.16 KiB
0db0c72+dirty	7.15 MiB	8.04 MiB	911.02 KiB
d361d38+dirty	7.15 MiB	8.08 MiB	959.34 KiB
ad6c299+dirty	7.15 MiB	8.04 MiB	912.17 KiB
27ef4ee+dirty	7.15 MiB	8.08 MiB	959.49 KiB