Removed Vert.x from KafkaConnectRoller

[ppatierno]

Type of change

• Refactoring

Description

This PR fixes #13200 by removing Vert.x from the KafkaConnectRoller class.

Checklist

• Reference relevant issue(s) and close them after merging
• Make sure all tests pass

[snyk-io]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues
✅	Licenses	0	0	0	0	0 issues
✅	Code Security	0	0	0	0	0 issues

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[ppatierno]

/gha run pipeline=regression

[github-actions]

⏳ System test verification started: link
Waiting for build to finish...

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.76%. Comparing base (96eee24) to head (ad5be08).

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #13205      +/-   ##
============================================
- Coverage     80.80%   80.76%   -0.04%     
+ Complexity     6816     6811       -5     
============================================
  Files           360      360              
  Lines         23351    23350       -1     
  Branches       3173     3173              
============================================
- Hits          18868    18858      -10     
- Misses         3249     3253       +4     
- Partials       1234     1239       +5     

Files with missing lines	Coverage Δ
...ter/operator/assembly/AbstractConnectOperator.java	88.91% <100.00%> (-0.26%)	⬇️
.../cluster/operator/assembly/KafkaConnectRoller.java	100.00% <100.00%> (ø)

... and 5 files with indirect coverage changes

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