fix: dont require profiler to start on main thread

[armcknight]

Fixes #2342

[RuiAAPeres]

Approved.

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1241.80 ms	1254.70 ms	12.90 ms
Size	20.50 KiB	343.44 KiB	322.94 KiB

Baseline results on branch: master

Startup times

Revision	Plain	With Sentry	Diff
6dc0bd1	1220.49 ms	1237.44 ms	16.95 ms
82e596a	1244.27 ms	1267.84 ms	23.57 ms
9ad4a5f	1251.53 ms	1276.46 ms	24.93 ms
3861500	1214.88 ms	1232.48 ms	17.60 ms
5025d2e	1245.14 ms	1268.58 ms	23.44 ms
4a0c282	1228.60 ms	1250.74 ms	22.14 ms
0fdf0b2	1266.27 ms	1277.90 ms	11.63 ms
64225be	1218.57 ms	1238.38 ms	19.81 ms
82e596a	1252.72 ms	1278.34 ms	25.62 ms
c929040	1254.84 ms	1278.42 ms	23.58 ms

App size

Revision	Plain	With Sentry	Diff
6dc0bd1	20.51 KiB	333.58 KiB	313.07 KiB
82e596a	20.50 KiB	337.76 KiB	317.25 KiB
9ad4a5f	20.50 KiB	342.23 KiB	321.73 KiB
3861500	20.50 KiB	333.54 KiB	313.04 KiB
5025d2e	20.51 KiB	331.79 KiB	311.28 KiB
4a0c282	20.51 KiB	333.10 KiB	312.60 KiB
0fdf0b2	20.51 KiB	332.90 KiB	312.39 KiB
64225be	20.50 KiB	339.02 KiB	318.51 KiB
82e596a	20.50 KiB	337.76 KiB	317.26 KiB
c929040	20.51 KiB	333.10 KiB	312.59 KiB

Previous results on branch: armcknight/fix/profiling-on-nonmain-threads

Startup times

Revision	Plain	With Sentry	Diff
6defbe2	1244.22 ms	1264.68 ms	20.46 ms

App size

Revision	Plain	With Sentry	Diff
6defbe2	20.50 KiB	343.44 KiB	322.94 KiB

[armcknight]

The failing test is SauceLabs wonkiness and not related to the code changes.