ce-ci builds seem to lack ability to run gcc 1.27

they fail to run:

```
2025-09-10T13:45:07.6581970Z 2025-09-10 13:45:07,657 lib.cefs.consolidation INFO Running post-consolidation safety checks for group 1
2025-09-10T13:45:12.5029645Z 2025-09-10 13:45:12,502 lib.installation_context DEBUG Executing ['/opt/compiler-explorer/gcc-1.27/bin/gcc', '-v'] in /opt/compiler-explorer
2025-09-10T13:45:12.9643965Z 2025-09-10 13:45:12,964 compilers/c/gcc 1.27 DEBUG File not found for ['gcc-1.27/bin/gcc', '-v']
2025-09-10T13:45:12.9644685Z 2025-09-10 13:45:12,964 lib.cefs.consolidation ERROR Post-consolidation check failed: compilers/c/gcc 1.27 reports not installed
```

works on the admin node OK:

Sep/10 13:58 admin-node~/infra (main|✔) $ /cefs/38/389c688f98ba10ac7e68ed40_consolidated/compilers_c_gcc_1.27/bin/gcc -v
gcc version 1.27

so my guess is we're missing 32-bit support in ce-ci as:

Sep/10 13:58 admin-node~/infra (main|✔) $ ldd /cefs/38/389c688f98ba10ac7e68ed40_consolidated/compilers_c_gcc_1.27/bin/gcc
linux-gate.so.1 (0xec283000)
libc.so.6 => /lib32/libc.so.6 (0xec041000)
/lib32/ld-linux.so.2 => /lib/ld-linux.so.2 (0xec285000)
Sep/10 13:58 admin-node~/infra (main|✔) $

Start with the ce-ci build environment and the post-consolidation safety check shown in the issue, then compare its runtime support with the admin node's ldd output for compilers_c_gcc_1.27/bin/gcc. Done means the ce-ci build can execute GCC 1.27 and the safety check no longer reports it as not installed.

Written by the indexing model from the issue text.