test: add a launch flag to allow skipping the sentry initialization

[armcknight]

helped to try reproducing a certain customer use case

#skip-changelog

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.415%. Comparing base (2a769ba) to head (4e24cd9).

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #4189       +/-   ##
=============================================
+ Coverage   91.411%   91.415%   +0.003%     
=============================================
  Files          606       606               
  Lines        48659     48658        -1     
  Branches     17555     17558        +3     
=============================================
+ Hits         44480     44481        +1     
+ Misses        4086      4085        -1     
+ Partials        93        92        -1     

see 4 files with indirect coverage changes

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1228.23 ms	1249.17 ms	20.94 ms
Size	21.58 KiB	683.63 KiB	662.05 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
699d76f	1221.63 ms	1249.92 ms	28.28 ms
23e2db5	1240.96 ms	1253.86 ms	12.90 ms
69d8759	1235.71 ms	1241.34 ms	5.63 ms
7419285	1209.53 ms	1244.72 ms	35.19 ms
c021422	1237.12 ms	1263.18 ms	26.06 ms
4654f66	1247.16 ms	1263.96 ms	16.80 ms
dfde86d	1215.12 ms	1221.30 ms	6.18 ms
e84bc3f	1257.08 ms	1267.41 ms	10.33 ms
eaf3840	1264.94 ms	1274.04 ms	9.10 ms
794f87f	1225.78 ms	1243.46 ms	17.68 ms

App size

Revision	Plain	With Sentry	Diff
699d76f	21.58 KiB	631.83 KiB	610.25 KiB
23e2db5	20.76 KiB	434.97 KiB	414.21 KiB
69d8759	20.76 KiB	393.05 KiB	372.29 KiB
7419285	20.76 KiB	432.99 KiB	412.22 KiB
c021422	20.76 KiB	435.64 KiB	414.88 KiB
4654f66	20.76 KiB	432.17 KiB	411.41 KiB
dfde86d	21.58 KiB	414.57 KiB	392.99 KiB
e84bc3f	20.76 KiB	434.72 KiB	413.96 KiB
eaf3840	22.84 KiB	401.67 KiB	378.83 KiB
794f87f	20.76 KiB	401.37 KiB	380.61 KiB