feat: add kubebuilders validations for name length to be <= 63

[jamyct]

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.65%. Comparing base (aef3b54) to head (a87267d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #218      +/-   ##
==========================================
- Coverage   79.68%   79.65%   -0.03%     
==========================================
  Files          27       27              
  Lines        3819     3819              
==========================================
- Hits         3043     3042       -1     
- Misses        620      621       +1     
  Partials      156      156              

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