ref(profiling): prepare for new public API

[armcknight]

• rename SentryProfiler.h to SentryProfiler+Private.h in case we need a public-facing SentryProfiler.h without all the interface that was already in that file
• there was already a SentryProfiler+Private.h; split up what was in there between the new one (nee SentryProfiler.h) and SentryProfiler+Test.h, depending on where the declarations are actually needed
• there were also two SentryProfiler+Test.h files: one in the SDK, and one in the test utils lib; remove the one in the SDK, and move its declarations to the one in the test lib along with the appropriate ones moved from the old SentryProfiler+Private.h that was deleted to make way for renaming SentryProfiler.h to SentryProfiler+Private.h

#skip-changelog

for #3555

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.957%. Comparing base (c0f08e7) to head (08d9d31).

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #3833       +/-   ##
=============================================
+ Coverage   90.948%   90.957%   +0.009%     
=============================================
  Files          560       560               
  Lines        44256     44256               
  Branches     15779     15784        +5     
=============================================
+ Hits         40250     40254        +4     
+ Misses        3936      3824      -112     
- Partials        70       178      +108     

Files	Coverage Δ
Sources/Sentry/PrivateSentrySDKOnly.mm	87.155% <ø> (ø)
Sources/Sentry/Profiling/SentryLaunchProfiling.m	62.666% <ø> (ø)
Sources/Sentry/SentryFramesTracker.m	100.000% <ø> (ø)
Sources/Sentry/SentryTracer.m	96.897% <ø> (+0.238%)	⬆️
Tests/SentryProfilerTests/SentryProfilerTests.mm	98.773% <ø> (ø)
...ts/SentryTests/Transaction/SentryTracerObjCTests.m	100.000% <ø> (ø)

... and 31 files with indirect coverage changes

---

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1233.65 ms	1250.08 ms	16.43 ms
Size	21.58 KiB	573.85 KiB	552.27 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
8838e54	1252.06 ms	1258.20 ms	6.14 ms
b15521e	1246.51 ms	1262.96 ms	16.45 ms
89b12eb	1236.02 ms	1246.63 ms	10.61 ms
45d3ca5	1248.27 ms	1255.48 ms	7.21 ms
42ef6ba	1201.67 ms	1214.35 ms	12.67 ms
742d4b6	1230.41 ms	1247.23 ms	16.83 ms
46267d8	1229.80 ms	1244.16 ms	14.37 ms
443723a	1205.24 ms	1220.52 ms	15.28 ms
e90aa6d	1277.38 ms	1303.18 ms	25.81 ms
f25febb	1224.69 ms	1247.38 ms	22.68 ms

App size

Revision	Plain	With Sentry	Diff
8838e54	22.85 KiB	413.45 KiB	390.60 KiB
b15521e	21.58 KiB	573.17 KiB	551.59 KiB
89b12eb	20.76 KiB	432.88 KiB	412.11 KiB
45d3ca5	20.76 KiB	427.54 KiB	406.78 KiB
42ef6ba	21.58 KiB	417.86 KiB	396.28 KiB
742d4b6	21.58 KiB	546.20 KiB	524.62 KiB
46267d8	21.58 KiB	572.21 KiB	550.63 KiB
443723a	20.76 KiB	414.44 KiB	393.68 KiB
e90aa6d	21.58 KiB	418.82 KiB	397.24 KiB
f25febb	21.58 KiB	414.92 KiB	393.34 KiB

Previous results on branch: armcknight/feat/3555-continuous-profiling/2-privatize-existing-api

Startup times

Revision	Plain	With Sentry	Diff
6bb8465	1231.29 ms	1243.78 ms	12.49 ms

App size

Revision	Plain	With Sentry	Diff
6bb8465	21.58 KiB	573.29 KiB	551.71 KiB

[brustolin]

LGTM

[philipphofmann]

LGTM 🚀