[cherry-pick Release-1.14] Remove multiple single quotes from Velero backup.status.validationErrors field

[shubham-pampattiwar]

Signed-off-by: Shubham Pampattiwar spampatt@redhat.com

update error message

Signed-off-by: Shubham Pampattiwar spampatt@redhat.com (cherry picked from commit f15cde5dfd4ae089baea88c88e924931253428b7)

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 58.71%. Comparing base (f95676a) to head (fc647ca). Report is 2 commits behind head on release-1.14.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## release-1.14 #8304 +/- ## ================================================ - Coverage 58.73% 58.71% -0.03% ================================================ Files 346 346 Lines 28840 28840 ================================================ - Hits 16940 16934 -6 - Misses 10471 10476 +5 - Partials 1429 1430 +1 ```

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