Improve 32-bit support

[Bolderaysky]

• Added x86 GCC runner. It's based on existing GCC runner with minor changes, so it runs for GCC versions supported by glaze (12, 13, 14)
• Minor fixes were made to allow building 32-bit version of glaze, which includes small tests adjustments and some minor changes like disabled decompression of large (> size_t) integers

These changes may potentially affect users of binary json with 32-bit systems (because of change in int_from_compressed, which otherwise caused compilation errors). Other than that, no one should be hurt :)

Fixes #1277

[stephenberry]

Nice, this looks good. Thank you so much! I'll merge this in. And, thanks for your notes on adding more checks for 32bit platforms.