Broader Intel compatibility

[wpbonelli]

Currently tests are limited to ifort 2021.6. It might be good to test more versions/support if possible/document if not?

Newer ifort succeeds with meson and cmake on mac/linux but I see test failures.

ifx fails with

error #5533: Feature found on this line is not yet supported in ifx
        call run_selected(testsuites(is)%collect, test_name, error_unit, stat)

I see link errors for meson+ifort on windows, maybe related to mesonbuild/meson#2132? cmake succeeds with ifort 2021.7.

#31 is a small step to more meson support