Provide it whenever we can detect a target architecture from the
compiler during compiler inspection. In order to avoid changing
existing IDs, do this only for compilers where we don't already
detect a target architecture during compiler identification.
Fixes: #17702
Follow the approach from commit 1d21dd0f7c (enable_language: Assume
compiler works if ABI detection compiles, 2020-05-25, v3.18.0-rc1~93^2)
to avoid a redundant check for F90 support. Almost all maintained
Fortran compilers support F90 these days.
Fixes: #22222
