20321 fix consistent interpolations check

[tom-brouwer-bex]

Adds liquid tag consistency validation to the interpolation check, and rebased from the original repository.

Additional validations:

• Content of {{ }} tags is the same, ignoring:
  • differences in whitespace around tags
  • Translation strings before the | passed to a function (e.g. {{ 'local language value' | method_name }}
• Content {% %} tags is the same, ignoring:
  • differences in whitespace around tags

Note that the following commits from our own for were removed in this rebase, since they were implemented in the original repository:

Our Commit	Replacement
Always set tag_handling to xml	DeepL: Default to tag_handling: xml
Fix warn_deprecated calls	Fix private method called for warn deprecated

Considerations for merging:

• This pull-request is relative to the 'main-base' branch, which is the same as the 'main' branch on the original
• Since this is a rebase, after merging the result has to be force-pushed to the existing main branch
• WARNING: Please ensure that the consistency fixes on monorepo are on both staging and production, before merging this to main

Closes bookingexperts/support#20321

[gstokkink]

LGTM 👍

[gstokkink]

@tom-brouwer-bex you will take care of merging and pushing to the main branch yourself?

[tom-brouwer-bex]

@gstokkink Yes, I'll take care of that once the updated interpolations are on production. Since it's a rebase, I'll first copy the existing 'main' branch to another branch, before force-pushing, to ensure we can revert if we see any issues.

[tom-brouwer-bex]

@gstokkink The interpolation fixes were on production, and I've now force-pushed this branch to the main branch. If we see issues, I've archived the old main branch under backup-main/20240214 so we can restore it again.

Manually closing this pull-request