Bring UMD into tt-metal repo as an external package using CPM

[blozano-tt]

Inspired by

@joelsmithTT

Designed to make the following people happy

@broskoTT @afuller-TT

Problem description

Submodules are annoying
Submodules lead to people reaching into things they shouldn't touch
UMD internals need not be exposed in this repo.

What's changed

Use package manager CPM to fetch and build UMD

Checklist

• Post commit CI passes
• Blackhole Post commit (if applicable)
• Model regression CI testing passes (if applicable)
• Device performance regression CI testing passes (if applicable)
• New/Existing tests provide coverage for changes

[blozano-tt]

This PR is waiting on tenstorrent/tt-umd#322

From there this PR needs to be updated to grab UMD from a tag.

Then it needs to be tested.