ci: refactor xcframework build workflows

[armcknight]

Separately from #5218, and also for #4925, try to consolidate the new workflow implementation so it's not duplicated in the 3 places it's needed (build, release, benchmark)

One extra benefit here is that the UI test workflow that build the xcframework seems to have built two variants of it: Sentry-Dynamic and Sentry (the static lib). But, only the static lib was actually being used. So in addition to getting a faster build, we halved the amount of compute being used.

Another is that it's more obvious what each workflow is actually using, instead of having to dig through makefile, then build script logic, to see which xcframework variant is being build for "iOSOnly" or "gameOnly" parameters and which SDKs it's building for, including maccatalyst.

A third is that we don't need to build the mac catalyst version of the xcframework for the app size increase metric. The first comparison after merging to main will be smaller than the last one build with mac catalyst, but then going forward when like is compared to like, this check will be fine again, just run faster.

Improvements in CI times for the jobs using the reusable workflows:

• benchmarking.yml (xcframework build wall time): before 2m14s; after 2m0s
• ui-tests.yml (xcframework build wall time for duplicated sdk test): before 10m11s , after 1m25s
• release.yml: similar to the speedup mentioned in chore(deps): bump rexml from 3.3.3 to 3.3.6 #4295 for build.yml

Also, an improvement on #5218 is that the reusable workflow invocations with two stages of matrices are grouped by outer jobs instead of all being in one flat list, unordered (new vs old):

new	old
_

#skip-changelog

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1230.06 ms	1247.49 ms	17.43 ms
Size	23.76 KiB	824.86 KiB	801.10 KiB

Previous results on branch: armcknight/ci/refactor-xcframework-build-workflows

Startup times

Revision	Plain	With Sentry	Diff
aa808ba	1213.37 ms	1245.27 ms	31.90 ms

App size

Revision	Plain	With Sentry	Diff
aa808ba	23.76 KiB	824.86 KiB	801.09 KiB

[itaybre]

LGTM
I would try to remove Carthage from the paths at some point, but that can be done later