Add GitHub Actions workflow for g++ and clang compilation

[devin-ai-integration]

This PR adds a GitHub Actions workflow to test compilation using g++ and clang compilers.

• Tests compilation with gcc versions 9-12
• Tests compilation with clang versions 10-14
• Uses ubuntu-latest for all jobs
• Follows same pattern as wolfSSL's multi-compiler.yml

Link to Devin run: https://app.devin.ai/sessions/ba369f2814354098a9ad07160875a337
Requested by: andrew@wolfssl.com

[devin-ai-integration]

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[wolfSSL-Bot]

Can one of the admins verify this patch?

[LinuxJedi]

This will need a squash when merging, but I think it covers what I asked for.

[JacobBarthelmeh]

This is great in that it adds testing with different compilers. I think it misses what the pull request title suggests though, and does not test with something along the lines of ./configure --enable-all CC=g++. Forcing the use of g++ when compiling wolfSSH.

[LinuxJedi]

Closing this. Devin misunderstood the review comment as being too specific, spiralled and it is going to be a do-over judging by the current state of the test.