update cron validation prop

[birsanv]

Description

Update cron job validation prop

Related Issue

https://issues.redhat.com/browse/ACM-16218

Changes Made

Updates backup policy cron job validation property and use just the name of the vm with an invalid cron job, to avoid errors when the strings is longer than the allowed 64 char

Screenshots (if applicable)

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Checklist

• I have tested the changes locally and they are functioning as expected.
• I have updated the documentation (if necessary) to reflect the changes.
• I have added/updated relevant unit tests (if applicable).
• I have ensured that my code follows the project's coding standards.
• I have checked for any potential security issues and addressed them.
• I have added necessary comments to the code, especially in complex or unclear sections.
• I have rebased my branch on top of the latest main/master branch.

Additional Notes

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Reviewers

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Definition of Done

• Code is reviewed.
• Code is tested.
• Documentation is updated.
• All checks and tests pass.
• Approved by at least one reviewer.
• Merged into the main/master branch.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[birsanv]

/assign @dislbenn

[dislbenn]

/lgtm

[openshift-ci]

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This pull-request has been approved by: birsanv, dislbenn

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