luarocks: fix C modules installation/removal on CLANG64 and CLANGARM64

[luau-project]

Description

Fixes #23493
Fixes the upstream issue luarocks/luarocks#1428 for MSYS2, because even though it was supposed to be fixed at luarocks/luarocks#1616, it still happens on MSYS2 even after a LuaRocks upgrade.

Changes:

• The first addition of code is responsible to fix luarocks: fails to install Lua modules written in C on CLANG64 and CLANGARM64 #23493;
• The second addition of code fixes luafilesystem (lfs) cannot be uninstalled under Windows (msys2/mingw) luarocks/luarocks#1428.

Note

I'll try to upstream these changes.

[luau-project]

Update

• The first block of changes, which fixes the installation of Lua modules written in C for CLANG64 and CLANGARM64, was merged upstream fix: override default C compiler to cc.exe on MSYS2 luarocks/luarocks#1754
• A modified version of the second block of changes, which fixes removal of Lua modules written in C, was merged upstream fix: allow LuaFileSystem and LuaSocket to be properly uninstalled on MSYS2 luarocks/luarocks#1756

Conclusion

Since both changes proposed here were merged upstream on top of LuaRocks 3.11.1, I think it would be cleaner to update LuaRocks towards 3.11.1 rather than 3.9.2 as I am doing here.

Question: What would be the correct way to proceed:

1. Update LuaRocks 3.9.2 as it is?
2. Update to LuaRocks 3.11.1 referencing the merges?
3. Something else?