Add slow and frozen frames span data conventions

[markushi]

📜 Description

Add slow and frozen frame keys to span conventions, as per https://github.com/getsentry/develop/pull/1099/files

#skip-changelog

💡 Motivation and Context

💚 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 d2947d1

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	393.67 ms	482.90 ms	89.23 ms
Size	1.72 MiB	2.27 MiB	554.95 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
0404ea3	332.47 ms	401.12 ms	68.66 ms
2a3dd50	363.61 ms	440.18 ms	76.57 ms
7ca9895	364.31 ms	460.46 ms	96.15 ms
c7e2fbc	393.98 ms	478.24 ms	84.27 ms
4e29063	384.14 ms	447.74 ms	63.60 ms
0bd723b	375.20 ms	452.41 ms	77.20 ms
8838e01	367.65 ms	447.40 ms	79.75 ms
86f0096	368.63 ms	446.92 ms	78.29 ms
93a76ca	377.96 ms	447.52 ms	69.56 ms
4e29063	376.38 ms	390.98 ms	14.60 ms

App size

Revision	Plain	With Sentry	Diff
0404ea3	1.72 MiB	2.29 MiB	577.52 KiB
2a3dd50	1.72 MiB	2.27 MiB	555.05 KiB
7ca9895	1.72 MiB	2.29 MiB	576.51 KiB
c7e2fbc	1.72 MiB	2.29 MiB	576.40 KiB
4e29063	1.72 MiB	2.29 MiB	578.38 KiB
0bd723b	1.72 MiB	2.29 MiB	578.09 KiB
8838e01	1.72 MiB	2.29 MiB	578.15 KiB
86f0096	1.72 MiB	2.29 MiB	576.50 KiB
93a76ca	1.72 MiB	2.29 MiB	576.75 KiB
4e29063	1.72 MiB	2.29 MiB	578.38 KiB

[buenaflor]

👍