feat: GA MetricKit integration

[philipphofmann]

📜 Description

Remove experimental note on options to make the MetricKit integration GA.

💡 Motivation and Context

Fixes GH-2585

💚 How did you test it?

Nothing to test for removing code comments.

📝 Checklist

You have to check all boxes before merging:

• 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: feat(apple): MetricKit GA sentry-docs#8186.
• 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 612ec4f

[codecov]

Codecov Report

Merging #3340 (612ec4f) into main (5b85619) will increase coverage by 0.063%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##              main     #3340       +/-   ##
=============================================
+ Coverage   89.252%   89.316%   +0.063%     
=============================================
  Files          502       502               
  Lines        54488     54485        -3     
  Branches     19570     19566        -4     
=============================================
+ Hits         48632     48664       +32     
+ Misses        4987      4958       -29     
+ Partials       869       863        -6     

see 14 files with indirect coverage changes

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1220.47 ms	1241.12 ms	20.66 ms
Size	22.85 KiB	411.37 KiB	388.52 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
005bb4c	1237.38 ms	1255.54 ms	18.16 ms
d257eb9	1206.98 ms	1227.50 ms	20.52 ms
fb53d97	1226.08 ms	1245.12 ms	19.04 ms
60dd0f5	1238.98 ms	1254.48 ms	15.50 ms
fd6a31c	1190.43 ms	1218.78 ms	28.35 ms
d40512b	1231.12 ms	1244.54 ms	13.42 ms
5616e0a	1224.12 ms	1249.86 ms	25.74 ms
fc163f5	1219.18 ms	1242.74 ms	23.56 ms
25737cb	1235.02 ms	1250.06 ms	15.04 ms
4fc7fdf	1236.69 ms	1242.80 ms	6.11 ms

App size

Revision	Plain	With Sentry	Diff
005bb4c	20.76 KiB	419.70 KiB	398.94 KiB
d257eb9	20.76 KiB	433.22 KiB	412.46 KiB
fb53d97	20.76 KiB	425.81 KiB	405.04 KiB
60dd0f5	20.76 KiB	393.37 KiB	372.61 KiB
fd6a31c	20.76 KiB	436.50 KiB	415.74 KiB
d40512b	20.76 KiB	427.77 KiB	407.00 KiB
5616e0a	22.85 KiB	407.44 KiB	384.59 KiB
fc163f5	20.76 KiB	436.29 KiB	415.53 KiB
25737cb	20.76 KiB	436.29 KiB	415.53 KiB
4fc7fdf	20.76 KiB	436.25 KiB	415.49 KiB