feat: Add frames delay to span data

[philipphofmann]

📜 Description

Also fix a couple of edge cases when calculating the frames delay when an ongoing delayed frame is not yet recorded.

💡 Motivation and Context

Fixes GH-3481

💚 How did you test it?

Unit tests and with the simulator

📝 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 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

Update the docs once we show the feature in mobile starfish.

[github-actions]

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

Generated by 🚫 dangerJS against 8409dee

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1237.75 ms	1254.57 ms	16.82 ms
Size	21.58 KiB	418.35 KiB	396.76 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
b064665	1230.04 ms	1254.08 ms	24.04 ms
ddc9b9a	1210.00 ms	1234.18 ms	24.18 ms
50bbebb	1234.76 ms	1246.66 ms	11.90 ms
2154ae1	1216.06 ms	1244.78 ms	28.72 ms
e7b566f	1199.57 ms	1218.76 ms	19.19 ms
fb53d97	1226.08 ms	1245.12 ms	19.04 ms
e8b11f8	1233.66 ms	1249.74 ms	16.08 ms
881a955	1230.69 ms	1244.12 ms	13.43 ms
3437454	1254.04 ms	1259.50 ms	5.46 ms
5ab598f	1213.90 ms	1240.45 ms	26.55 ms

App size

Revision	Plain	With Sentry	Diff
b064665	22.85 KiB	413.42 KiB	390.57 KiB
ddc9b9a	20.76 KiB	420.40 KiB	399.64 KiB
50bbebb	21.58 KiB	414.96 KiB	393.38 KiB
2154ae1	20.76 KiB	427.83 KiB	407.06 KiB
e7b566f	22.85 KiB	414.80 KiB	391.95 KiB
fb53d97	20.76 KiB	425.81 KiB	405.04 KiB
e8b11f8	22.85 KiB	411.92 KiB	389.07 KiB
881a955	22.85 KiB	407.63 KiB	384.78 KiB
3437454	22.85 KiB	408.87 KiB	386.02 KiB
5ab598f	22.84 KiB	403.17 KiB	380.33 KiB

[codecov]

Codecov Report

Merging #3496 (8409dee) into main (de033da) will increase coverage by 0.014%.
The diff coverage is 100.000%.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #3496       +/-   ##
=============================================
+ Coverage   89.163%   89.178%   +0.014%     
=============================================
  Files          528       528               
  Lines        57224     57441      +217     
  Branches     20260     20579      +319     
=============================================
+ Hits         51023     51225      +202     
- Misses        5286      5297       +11     
- Partials       915       919        +4     

Files	Coverage Δ
Sources/Sentry/SentryDelayedFramesTracker.m	100.000% <100.000%> (ø)
Sources/Sentry/SentryFramesTracker.m	100.000% <100.000%> (ø)
Sources/Sentry/SentrySpan.m	98.453% <100.000%> (+0.057%)	⬆️
...ance/FramesTracking/SentryFramesTrackerTests.swift	99.082% <100.000%> (+0.051%)	⬆️
...ests/SentryTests/Transaction/SentrySpanTests.swift	99.389% <100.000%> (-0.010%)	⬇️

... and 66 files with indirect coverage changes

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[brustolin]

LGTM