chore: Add tests for SentryCrashContext

[itaybre]

Adds a couple of tests before adding some modifications

Shame on me, but using ObjC for tests since that allows me to use the macros

#skip-changelog

Closes #6374

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (main@ba80daf). Learn more about missing BASE report.
⚠️ Report is 13 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main     #6373   +/-   ##
========================================
  Coverage        ?   86.779%           
========================================
  Files           ?       439           
  Lines           ?     37238           
  Branches        ?     17364           
========================================
  Hits            ?     32315           
  Misses          ?      4877           
  Partials        ?        46           

Files with missing lines	Coverage Δ
.../Recording/Tools/SentryCrashMachineContext_Apple.h	100.000% <ø> (ø)

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[philipphofmann]

The tests don't cleanup the threads. We need to fix that. Otherwise, we might end up with flaky tests.

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1234.67 ms	1269.61 ms	34.94 ms
Size	23.75 KiB	988.01 KiB	964.26 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
e8da57d	1203.77 ms	1234.85 ms	31.08 ms
aff3b66	1229.53 ms	1263.08 ms	33.55 ms
e0424b9	1204.23 ms	1241.08 ms	36.85 ms
6d40fee	1217.47 ms	1245.37 ms	27.90 ms
99ec589	1209.73 ms	1231.98 ms	22.24 ms
854ca12	1219.94 ms	1251.32 ms	31.38 ms
3ffd0e5	1228.04 ms	1253.04 ms	25.00 ms
6279992	1213.60 ms	1241.38 ms	27.79 ms
2b02431	1229.63 ms	1248.98 ms	19.35 ms
b9aacb6	1230.42 ms	1251.00 ms	20.58 ms

App size

Revision	Plain	With Sentry	Diff
e8da57d	23.75 KiB	919.69 KiB	895.94 KiB
aff3b66	23.75 KiB	978.53 KiB	954.78 KiB
e0424b9	23.74 KiB	874.07 KiB	850.33 KiB
6d40fee	23.75 KiB	912.37 KiB	888.63 KiB
99ec589	23.75 KiB	983.31 KiB	959.57 KiB
854ca12	23.74 KiB	996.96 KiB	973.22 KiB
3ffd0e5	23.75 KiB	947.55 KiB	923.80 KiB
6279992	23.75 KiB	891.03 KiB	867.28 KiB
2b02431	23.75 KiB	850.73 KiB	826.98 KiB
b9aacb6	23.75 KiB	913.64 KiB	889.89 KiB

Previous results on branch: itay/tests_sentry_crash

Startup times

Revision	Plain	With Sentry	Diff
59e824b	1221.24 ms	1254.35 ms	33.11 ms

App size

Revision	Plain	With Sentry	Diff
59e824b	23.75 KiB	986.80 KiB	963.05 KiB