Github Action MacOSX revamp

[dlmiles]

The FREAD macro name is renamed due to clash with sys/fcntl.h in Xcode SDK on MacOSX.

The GHA will build for both legacy x86_64 and newer ARM64 platforms.

The configure_mac resolves an issue with the wrong X/Xlib.h header being included due to a (bad) copy being bundled with tk-tcl when the copy from quartz is the one needed.

[dlmiles]

Updated: Somehow lost TMPFILE=value assignment in YML during final prepare

[dlmiles]

Next iteration on MacOS CI in Github Acton:

• diagnostics improved
• autoconf X11 compiler/linker switches fixed (maybe this wasn't causing an issue, but manual inspection of the -L/usr/X11/lib placement indicated it would have no effect at the end of the linker options)
• Github Action Summary output (everything you might want to know is listed)
• Performs install
• Performs kick the tyres testing, to confirm it runs without crashing
• It prepares download files with what is built (maybe the binaries work, maybe they don't, I try to solicit feedback) As before:
• Builds for x86_64 and ARM64 MacOS

[RTimothyEdwards]

Pulled and merged into opencircuitdesign.com code base.