ci: remove requirement for semantic commit in single-commit PRs

[mowies]

This PR

• disables the semantic PR check for single commit PRs preventing PRs to be merged that have a single commit that is not semantic. This is not needed anymore since github introduced a setting to always use the PR title as the commit message during squash and merge.

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[mowies]

This will hopefully be appreciated by @agardnerIT 😅

[codecov]

Codecov Report

Merging #1535 (189510a) into main (c732492) will increase coverage by 0.02%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1535      +/-   ##
==========================================
+ Coverage   63.04%   63.07%   +0.02%     
==========================================
  Files         142      142              
  Lines       10779    10779              
==========================================
+ Hits         6796     6799       +3     
+ Misses       3724     3722       -2     
+ Partials      259      258       -1     

see 1 file with indirect coverage changes

Flag	Coverage Δ
certificate-operator	68.55% <ø> (ø)
component-tests	58.14% <ø> (+0.20%)	⬆️
lifecycle-operator	84.35% <ø> (ø)
metrics-operator	81.66% <ø> (ø)
scheduler	30.45% <ø> (ø)

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