chore: use distroless images from MCR

[Arvindthiru]

What type of PR is this?

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

Requirements:

• run make reviewable for basic local test
• Read and followed fleet-networking's Code of conduct.
• uses conventional commit messages
• includes documentation
• adds unit tests

How has this code been tested

Special notes for your reviewer

E2E run with current changes https://github.com/Azure/fleet-networking/actions/runs/16841795712/job/47714303736

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.71%. Comparing base (98d3bbe) to head (cd7d2be).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #327   +/-   ##
=======================================
  Coverage   67.71%   67.71%           
=======================================
  Files          34       34           
  Lines        5046     5046           
=======================================
  Hits         3417     3417           
+ Misses       1442     1441    -1     
- Partials      187      188    +1     

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[jeremyrickard]

LGTM