Disable YAML line-length warnings

[alan-walsh]

Summary

• Disable yamllint line-length so long YAML lines no longer generate warning annotations.
• Keep the YAML lint workflow and all other yamllint rules unchanged.

Why

• The 120-character limit was warning-only style guidance, not a YAML, Helm, or Kubernetes validity requirement.
• These annotations were routinely ignored and added code review noise.

Verification

• yamllint -f github .yamllint
• Synthetic 130-character YAML scalar via stdin with yamllint -f github - produced no annotations.

Note: Full-repo yamllint on this Windows checkout reports existing new-lines errors from CRLF worktree line endings, so it was not used as the acceptance signal for this one-rule change.

[Copilot]

Pull request overview

This PR updates the repository’s yamllint configuration to stop emitting GitHub annotation warnings for long YAML lines, while keeping the rest of the linting rules and workflow behavior unchanged.

Changes:

• Disable the line-length rule in .yamllint to prevent line-length warning annotations.

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