gh-3577
Add GCC 12.1.0 for cross targets: - mips + mips64 + mipsel + mips64el - powerpc + powerpc64 + powerpc64le - s390x - arm + arm64 (only add new languages) - riscv32 + riscv64 (only add new languages) - avr - msp430 When possible, the following languages have been enabled: - Ada (GNAT), except for targets supported by Alire - D (GDC) - Fortran (gfortran) - C++ - C refs #3729 refs #3761