feat!: Switch UOM API to YAML format

[weichou1229]

BREAKING CHANGE: It was decided in Minnesota planning that all TOML files would be change to be YAML format.

Close #4441

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PR Checklist

Please check if your PR fulfills the following requirements:

• I am not introducing a breaking change (if you are, flag in conventional commit message with BREAKING CHANGE: describing the break)
• I am not introducing a new dependency (add notes below if you are)
• I have added unit tests for the new feature or bug fix (if not, why?) not impact
• I have fully tested (add details below) this the new feature or bug fix (if not, why?)
• I have opened a PR for the related docs change (if not, why?)

Testing Instructions

• Run unit test
• Test the uom API

curl 'http://localhost:59881/api/v2/uom' --header 'Accept: application/x-yaml'

New Dependency Instructions (If applicable)

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

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[cloudxxx8]

LGTM

[codecov-commenter]

Codecov Report

Merging #4462 (f24b784) into main (fe5feeb) will not change coverage.
The diff coverage is 100.00%.

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@@           Coverage Diff           @@
##             main    #4462   +/-   ##
=======================================
  Coverage   41.74%   41.74%           
=======================================
  Files         106      106           
  Lines        9747     9747           
=======================================
  Hits         4069     4069           
  Misses       5332     5332           
  Partials      346      346           

Impacted Files	Coverage Δ
internal/core/metadata/controller/http/uom.go	100.00% <100.00%> (ø)

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[lenny-goodell]

LGTM