ci: Bypass success() chain for xcframework publish

The needs.xcframework.result alone isn't enough to escape GitHub
Actions' chained success() check; add !cancelled() so the condition
is evaluated even when needed jobs transitively report failure.

subprojects: Prepare for release

subprojects: Prepare for release

subprojects: Prepare for release

subprojects: Prepare for release

android: Implement sigchain logic when needed

subprojects: Prepare for release

ci: Move xcframework .modulemap inside a subdir

To avoid clashes when an app links with multiple static frameworks, each
with their own modulemap.

ci: Remove snapshot-tag.yml

Actually triggering ci.yml seems like a rabbit-hole. Leaving for later.