Add yamllint pre-commit hook for YAML file standardization

[vanzan01]

Add yamllint hook to .pre-commit-config.yaml to standardize YAML files across the project. Created .yamllint.yml configuration with relaxed rules to accommodate existing files. Fixed colon spacing in .asf.yaml to pass yamllint checks.

Changes

• Add yamllint hook to .pre-commit-config.yaml
• Create .yamllint.yml configuration with relaxed rules for existing files
• Fix colon spacing in .asf.yaml to pass yamllint checks

Test plan

• yamllint runs successfully on existing YAML files
• Configuration allows existing files to pass with minimal changes
• Fixed formatting issue in .asf.yaml

Closes #10974

[boring-cyborg]

Congratulations on your first Pull Request and welcome to the Apache CloudStack community! If you have any issues or are unsure about any anything please check our Contribution Guide (https://github.com/apache/cloudstack/blob/main/CONTRIBUTING.md)
Here are some useful points:

• In case of a new feature add useful documentation (raise doc PR at https://github.com/apache/cloudstack-documentation)
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[DaanHoogland]

@blueorangutan package

[blueorangutan]

@DaanHoogland a [SL] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 16.60%. Comparing base (6aaaa83) to head (4acfdf5).

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #11017      +/-   ##
============================================
- Coverage     16.60%   16.60%   -0.01%     
+ Complexity    13925    13924       -1     
============================================
  Files          5730     5730              
  Lines        508224   508224              
  Branches      61789    61789              
============================================
- Hits          84388    84387       -1     
- Misses       414401   414402       +1     
  Partials       9435     9435              

Flag	Coverage Δ
uitests	3.93% <ø> (ø)
unittests	17.49% <ø> (-0.01%)	⬇️

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[blueorangutan]

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ debian ✔️ suse15. SL-JID 13778

[DaanHoogland]

@blueorangutan package

[blueorangutan]

@DaanHoogland a [SL] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

[blueorangutan]

Packaging result [SF]: ✖️ el8 ✖️ el9 ✔️ debian ✖️ suse15. SL-JID 13794

[blueorangutan]

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ debian ✔️ suse15. SL-JID 13815

[DaanHoogland]

clgtm