Fix 32bit build

[Rot127]

Your checklist for this pull request

• I've documented or updated the documentation of every API function and struct this PR changes.
• I've added tests that prove my fix is effective or that my feature works (if possible)

Detailed description

Fixes the 32bit build and enables the tests for it.

• Remove all usage of va_args and updates Mips, LoongArch, ARM, and PPC to use the ARCH_add_cs_detail_X() functions instead of the generic add_cs_detail().
• Fixes several bugs related to unspecified type widths and not portable formatting.
• Adds several cross builds for testing.

Test plan

All Python 32bit builds and tests must be green.

Closing issues

closes #2458
addresses #2416 for v6.

[Rot127]

@Antelox Please review as well.

I can't download the test logs (some Github bug as it looks like) to confirm everything went through without bugs.
So mark it as draft until I could.