[release/8.0] Stop stripping new lines from migration script literals (#32788) #32851
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Port of #32788
Fixes #32730
Description
Replacement of a regex results in empty lines being stripped from literals in migrations when they were not stripped before.
Customer impact
Corrupted literals in migrations.
How found
Customer reported on 8.
Regression
Yes, from 7.
Testing
Tests added.
Risk
Low. Quirked.