Merge develop into release-0.3.0 for 0.3.25

Add OSX hw.cpufamily autodetection for Apple M3 as VORTEX

* Update Changelog.txt for 0.3.25

Fix empty function prototypes

Make vector orthogonalization more reliable (Reference-LAPACK PR 930)

Limit CI runs to pushes and pull requests on main repo

Apply rounding up to workspace calculations done with reals (Reference-LAPACK PR 904)

Change ?GECON to return INFO=1 if RCOND is NaN (Reference-LAPACK PR 926)

Add workaround for omp_get_max_threads hanging on FreeBSD/LLVM14

* Move ?GELQS and ?GEQRS from TESTING/LIN to DEPRECATED (Reference-LAPACK PR 900)

* Add f2c-converted versions of ?GELQS and ?GEQRS

Improve matcopy interface

Move clang/gfortran OpenMP dependency rewriting out of f_check

Enable autodetection of Zen 3/4 cpus as their AVX512 Intel counterparts

Put more build information into Makefile.conf_last

* rows = 0 or cols = 0 is now a legal input and
  takes quick return path
* Follow BLAS/LAPACK convention that the leading
  dimensions must be at least 1.

The `group` expression ensures that the cancel-in-progress
behavior is to only cancel if a new commit is pushed to the PR for
which the job is running, not other PRs.

This is a fairly standard snippet, used also in CI jobs for NumPy
and other projects.

This is a follow-up to gh-4271. At the moment, when a contributor
pushes the latest `develop` to their own branch to bring their own
fork in sync with `main`, or if they push another branch, this triggers
30 CI jobs to run. Most will complete silently and only burn CPU
time unnecessarily. If there's a failure, this may result in unexpected
failure notifications. And the AWS Graviton3 run won't complete at all
and time out, since the Cirun hook will only work when triggered from
the main repo.

Fix FCOMMON_OPT for power.  Error out for certain C and Fortran compiler combos on AIX

Only define __builtin_cpu_is and __builtin_cpu_supports if not present.

(Re)apply Makefile fix for supporting only a subset of precision types

Correct constant ALPHA in ?ORBDB6 (Reference-LAPACK PR 928)

Fix accumulation in LAPACK ?LASSQ (Reference-LAPACK PR 909)

Fix potential integer overflow in LAPACK C/ZBDSQR (Reference-LAPACK PR 927)

* Clean up ZROTG