chore: Remove workflow: add-reviewer-monitoring.yaml

[akrejcir]

What this PR does / why we need it:
Currently the workflow adds comments to PRs too often.

We will make a better solution in a future PR.

Special notes for your reviewer:
This is a partial PR from: #669

Release note:

None

[sonarcloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[akrejcir]

/cc @0xFelix @jcanocan

[0xFelix]

/approve

[kubevirt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: 0xFelix

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[jcanocan]

/lgtm

[kubevirt-bot]

@akrejcir: #874 failed to apply on top of branch "release-v0.19":

Applying: chore: Remove workflow: add-reviewer-monitoring.yaml
Using index info to reconstruct a base tree...
M	.github/workflows/add-reviewer-monitoring.yaml
Falling back to patching base and 3-way merge...
CONFLICT (modify/delete): .github/workflows/add-reviewer-monitoring.yaml deleted in chore: Remove workflow: add-reviewer-monitoring.yaml and modified in HEAD. Version HEAD of .github/workflows/add-reviewer-monitoring.yaml left in tree.
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 chore: Remove workflow: add-reviewer-monitoring.yaml
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherry-pick release-v0.19

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