CI: Test builds with TSD stubs and TLS variables

Add builds to the CI script that use the TSD dispatch stubs, but use the
TLS variable in u_current_tls.c for the dispatch table.

That's the combination you'd get with musl or other non-glibc systems.
14 jobs for tls-config-options in 2 minutes and 34 seconds (queued for 10 seconds)