ref(profiling): move sliceGPUData to timeseries code unit; prefix C functions

[armcknight]

Taking some time to clean up the implementation of SentryProfiler and organize it a little better before moving forward with adding the continuous profiling implementation.

This moves the sliceGPU function out of SentryProfiler.mm and into SentryProfilerTimeseries.mm. Also prefix the C function names with _sentry as in #3862

for #3555 #skip-changelog

[codecov]

Codecov Report

Attention: Patch coverage is 69.44444% with 11 lines in your changes are missing coverage. Please review.

Project coverage is 90.635%. Comparing base (94e1968) to head (390a859).
Report is 2 commits behind head on main.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #3872       +/-   ##
=============================================
- Coverage   90.639%   90.635%   -0.005%     
=============================================
  Files          579       579               
  Lines        45298     45297        -1     
  Branches     16121     16124        +3     
=============================================
- Hits         41058     41055        -3     
- Misses        4170      4172        +2     
  Partials        70        70               

Files	Coverage Δ
Sources/Sentry/SentryProfiler.mm	87.209% <100.000%> (+1.875%)	⬆️
Tests/SentryProfilerTests/SentryProfilerTests.mm	98.773% <100.000%> (ø)
Sources/Sentry/SentryProfileTimeseries.mm	57.831% <64.516%> (+3.985%)	⬆️

... and 11 files with indirect coverage changes

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1215.45 ms	1231.07 ms	15.62 ms
Size	21.58 KiB	614.71 KiB	593.13 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
becc941	1221.90 ms	1240.37 ms	18.47 ms
f8833c4	1229.69 ms	1236.45 ms	6.76 ms
8f397a7	1219.12 ms	1236.67 ms	17.55 ms
7c37d8e	1256.00 ms	1259.36 ms	3.36 ms
7fb7afb	1227.73 ms	1243.16 ms	15.43 ms
6ad07ae	1240.76 ms	1242.98 ms	2.22 ms
5b6694b	1221.71 ms	1259.06 ms	37.35 ms
1437c68	1244.86 ms	1254.18 ms	9.32 ms
154f795	1250.38 ms	1274.54 ms	24.16 ms
7bb0873	1226.18 ms	1247.30 ms	21.12 ms

App size

Revision	Plain	With Sentry	Diff
becc941	21.58 KiB	419.82 KiB	398.24 KiB
f8833c4	21.58 KiB	422.66 KiB	401.08 KiB
8f397a7	20.76 KiB	420.55 KiB	399.79 KiB
7c37d8e	20.76 KiB	426.86 KiB	406.09 KiB
7fb7afb	20.76 KiB	419.70 KiB	398.94 KiB
6ad07ae	20.76 KiB	424.69 KiB	403.93 KiB
5b6694b	20.76 KiB	426.11 KiB	405.34 KiB
1437c68	22.85 KiB	410.96 KiB	388.11 KiB
154f795	20.76 KiB	435.25 KiB	414.49 KiB
7bb0873	22.85 KiB	407.09 KiB	384.24 KiB

[philipphofmann]

LGTM 🚀