Delete using namespace in command queue interface header

[nhuang-tt]

Ticket

#18325

Problem description

• api/command_queue_interface.hpp has a using namespace tt::tt_metal at the top of the file in the global namespace, causing the entire repository's global namespace to be polluted and making conflicting types.

What's changed

• Delete using namespace tt::tt_metal from the header
• Fully qualify types in tt::tt_metalin header files.
• Updated the cpp files

Checklist

• All post commit CI passes
• Blackhole Post commit CI passes (if applicable)
• Model regression CI passes (if applicable)
• Device performance regression CI passes (if applicable)
• (For models and ops writers) Full new models tests CI passes (if applicable)
• New/Existing tests provide coverage for changes

[omilyutin-tt]

Thank you for doing this - this is really great! 🔥

Adding using namespace ... in .cpp makes sense to do the migration. I think ideally, we wouldn't even need that - spelling full types or adding explicit aliases for stuff we need is less invasive and more robust.

[jvegaTT]

Great PR but be mindful this will basically clash with everything. Be super careful about merge conflicts and please make an announcement on slack when it's merged so those with open PRs are aware