Ignore typedef-redefinition warnings with Clang and Fix enum type mismatch in copy flags

[bbhtt]

Fixes: #3590
Fixes: #3591

[openshift-ci]

Hi @bbhtt. Thanks for your PR.

I'm waiting for a ostreedev member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work.

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[gemini-code-assist]

Code Review

This pull request updates the build configuration to suppress typedef redefinition warnings when using Clang and modifies the directory attribute copying logic in the sysroot deployment process to use converted flags via sysroot_flags_to_copy_flags. I have no feedback to provide as there are no review comments.

[bbhtt]

Failures seem to be unrelated, GCC 16 issues.