fix: decouple dual-purpose profiling IDs

[armcknight]

one was used to profile concurrent spans in the client, and that was reused for the ID needed to identify profiles in the backend, and we wound up in a situation where one profile ID used for multiple concurrent spans was reused for each of their profiles

[codecov]

Codecov Report

Merging #3282 (5951641) into main (881a955) will decrease coverage by 0.017%.
The diff coverage is 100.000%.

@@              Coverage Diff              @@
##              main     #3282       +/-   ##
=============================================
- Coverage   89.223%   89.206%   -0.017%     
=============================================
  Files          501       502        +1     
  Lines        53949     54257      +308     
  Branches     19170     19477      +307     
=============================================
+ Hits         48135     48401      +266     
- Misses        4958      4997       +39     
- Partials       856       859        +3     

Files Changed	Coverage
...entry/Profiling/SentryProfiledTracerConcurrency.mm	100.000%
Sources/Sentry/SentryProfiler.mm	100.000%
Tests/SentryProfilerTests/SentryProfilerTests.mm	100.000%

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1256.57 ms	1265.68 ms	9.11 ms
Size	22.85 KiB	407.63 KiB	384.78 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
102f2a6	1225.71 ms	1244.28 ms	18.57 ms
47b41ed	1252.31 ms	1253.96 ms	1.64 ms
c00eafe	1198.26 ms	1227.62 ms	29.36 ms
e1eed6b	1259.08 ms	1270.57 ms	11.49 ms
bd2afa6	1245.24 ms	1263.18 ms	17.94 ms
e5ac362	1204.12 ms	1229.41 ms	25.29 ms
443723a	1205.24 ms	1220.52 ms	15.28 ms
005bb4c	1237.38 ms	1255.54 ms	18.16 ms
ea73af6	1241.69 ms	1252.96 ms	11.27 ms
0dfdaaa	1226.88 ms	1248.82 ms	21.94 ms

App size

Revision	Plain	With Sentry	Diff
102f2a6	20.76 KiB	433.18 KiB	412.42 KiB
47b41ed	20.76 KiB	436.66 KiB	415.90 KiB
c00eafe	20.76 KiB	432.87 KiB	412.11 KiB
e1eed6b	20.76 KiB	432.17 KiB	411.41 KiB
bd2afa6	20.76 KiB	420.55 KiB	399.79 KiB
e5ac362	20.76 KiB	426.11 KiB	405.34 KiB
443723a	20.76 KiB	414.44 KiB	393.68 KiB
005bb4c	20.76 KiB	419.70 KiB	398.94 KiB
ea73af6	20.76 KiB	425.76 KiB	404.99 KiB
0dfdaaa	20.76 KiB	434.56 KiB	413.79 KiB

Previous results on branch: armcknight/fix/profile-id-reuse

Startup times

Revision	Plain	With Sentry	Diff
5a52ddf	1196.26 ms	1226.28 ms	30.02 ms

App size

Revision	Plain	With Sentry	Diff
5a52ddf	22.85 KiB	407.65 KiB	384.80 KiB

[indragiek]

💯

[github-actions]

	Fails
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## Unreleased

- decouple dual-purpose profiling IDs ([#3282](https://github.com/getsentry/sentry-cocoa/pull/3282))

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