test-everything
- Disable `vsx` tests for `ppc` and `ppc64` - Disable `tme` tests for `aarch64` and `aarch64_be` - Disable `frecipe` tests for `loongarch64` - Add `altivec` run for PPC32 (with `-C target-feature=+vsx` `qemu` gives a nasty error)
max
- `ppc32` doesn't have `max` cpu model, so set it to `mpc8610`
+ Bump ubuntu to 25.04, windows to `windows-2025`, macos-arm to `macos-15` and macos-x86 to `macos-15-large`