ci: build sample apps on latest macOS image and Xcode version

[armcknight]

• use macos-15 and Xcode 16.3 for sample app build jobs (they were a mixture of older ones, but this is just to make sure they compile at all, so we should be able to use the same thing for them all, and that should be what we're all presumably using on our local machines as well)
• remove the default for the xcode version parameter in ci-select-xcode.sh: it's better to see exactly what version is being used in the workflow config files. if we were to change the default in the bash script, that change is invisible in the workflow configs. also, we didn't have any naked invocations anyways

make session-replay-camera-test-xcode will generate the project, although in the future we might want a small script to do this that can take some parameters like platform/version/language/UI-lib

#skip-changelog

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.791%. Comparing base (8a21e27) to head (8d1b1e7).
Report is 4 commits behind head on main.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #5105       +/-   ##
=============================================
+ Coverage   92.694%   92.791%   +0.096%     
=============================================
  Files          676       676               
  Lines        83874     83877        +3     
  Branches     29458     30530     +1072     
=============================================
+ Hits         77747     77831       +84     
+ Misses        6031      5949       -82     
- Partials        96        97        +1     

see 24 files with indirect coverage changes

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1216.66 ms	1240.51 ms	23.85 ms
Size	22.30 KiB	848.26 KiB	825.96 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
f25febb	1238.80 ms	1245.35 ms	6.56 ms
69d8759	1235.71 ms	1241.34 ms	5.63 ms
ce4cfaf	1203.61 ms	1218.86 ms	15.25 ms
7419285	1209.53 ms	1244.72 ms	35.19 ms
b15521e	1224.44 ms	1251.13 ms	26.68 ms
bd2afa6	1245.24 ms	1263.18 ms	17.94 ms
53b29ac	1228.81 ms	1244.96 ms	16.15 ms
443fb02	1231.06 ms	1252.60 ms	21.54 ms
888a145	1228.63 ms	1248.94 ms	20.30 ms
70c49ca	1206.44 ms	1233.07 ms	26.62 ms

App size

Revision	Plain	With Sentry	Diff
f25febb	21.58 KiB	414.92 KiB	393.34 KiB
69d8759	20.76 KiB	393.05 KiB	372.29 KiB
ce4cfaf	20.76 KiB	423.19 KiB	402.43 KiB
7419285	20.76 KiB	432.99 KiB	412.22 KiB
b15521e	21.58 KiB	573.18 KiB	551.60 KiB
bd2afa6	20.76 KiB	420.55 KiB	399.79 KiB
53b29ac	22.32 KiB	819.55 KiB	797.24 KiB
443fb02	22.30 KiB	832.42 KiB	810.11 KiB
888a145	21.58 KiB	713.54 KiB	691.96 KiB
70c49ca	22.31 KiB	778.76 KiB	756.45 KiB

[philipphofmann]

Thanks for the cleanup