chore: Use at least xcode 16 for all jobs

[itaybre]

Bumps the version of Xcode used to at least 16 (16.2 on macOS 14) so we can use newer Xcode 16's features.

Also cleanups some steps and parameters that aren't neeed anymore.

Closes #7033

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.986%. Comparing base (83cd14a) to head (fc8c931).
⚠️ Report is 6 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #7012       +/-   ##
=============================================
- Coverage   85.070%   84.986%   -0.085%     
=============================================
  Files          454       454               
  Lines        27737     27548      -189     
  Branches     12157     12126       -31     
=============================================
- Hits         23596     23412      -184     
- Misses        4096      4097        +1     
+ Partials        45        39        -6     

see 36 files with indirect coverage changes

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1220.31 ms	1252.51 ms	32.20 ms
Size	24.14 KiB	1.02 MiB	1022.54 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
3b189e1	1231.11 ms	1266.47 ms	35.36 ms
762a701	1219.96 ms	1249.92 ms	29.96 ms
a4bd249	1221.73 ms	1251.09 ms	29.35 ms
7f2f69c	1237.61 ms	1266.96 ms	29.35 ms
e3ca5b3	1229.26 ms	1266.79 ms	37.53 ms
6b01cf3	1197.98 ms	1219.88 ms	21.90 ms
331dad6	1210.40 ms	1242.06 ms	31.67 ms
5bc23b4	1233.09 ms	1270.47 ms	37.38 ms
b7b4358	1224.05 ms	1253.69 ms	29.64 ms
7148f97	1235.09 ms	1258.07 ms	22.98 ms

App size

Revision	Plain	With Sentry	Diff
3b189e1	24.14 KiB	1.02 MiB	1019.58 KiB
762a701	23.75 KiB	1022.66 KiB	998.91 KiB
a4bd249	24.14 KiB	1.01 MiB	1015.25 KiB
7f2f69c	23.75 KiB	913.38 KiB	889.63 KiB
e3ca5b3	24.14 KiB	1.02 MiB	1017.42 KiB
6b01cf3	23.75 KiB	1.00 MiB	1005.08 KiB
331dad6	23.75 KiB	928.12 KiB	904.37 KiB
5bc23b4	24.14 KiB	1.01 MiB	1012.90 KiB
b7b4358	23.75 KiB	1.00 MiB	1005.08 KiB
7148f97	23.75 KiB	854.78 KiB	831.03 KiB

Previous results on branch: itay/try_latest_xcode

Startup times

Revision	Plain	With Sentry	Diff
fe6ecaa	1217.98 ms	1265.78 ms	47.80 ms

App size

Revision	Plain	With Sentry	Diff
fe6ecaa	24.14 KiB	1.02 MiB	1022.54 KiB

[philprime]

LGTM