Updated error message when VR MR suggestions can’t be created

Darby Freyrequested to merge
updated-vr-suggestion-error-message into master

What does this MR do and why?

This MR updates the error message displayed to users when there is an error attempting to apply a VR suggestion to a merge requested. Related to #498143 (comment 2150977722)

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/mileston %17.6

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