Add 32-bit build support to installation.

[pmienk]

32-bit support can be achieved by utilization of appropriate packages along with the -m32 compiler parameter and appropriate dependency configuration (Boost). Adding support via the installation script is possible and allows for increased test matrix coverage.

[pmienk]

Tested manually using

• additional packages: gcc-multilib, g++-multilib, lib32stdc++-12-dev and libc6-dev-i386
• compilers: gcc-12/g++-12
• c/cxxflags: -m32
• boost: added architecture=x86 and -m32 to c/cxxflags