Updated Twig CS Fixer and Rector configs to respect some Drupal-specific requirements.

[codecov[bot]]

Codecov Report

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

Project coverage is 57.61%. Comparing base (0f437a5) to head (2f814d0).

:exclamation: There is a different number of reports uploaded between BASE (0f437a5) and HEAD (2f814d0). Click for more details.

HEAD has 1 upload less than BASE

| Flag | BASE (0f437a5) | HEAD (2f814d0) | |------|------|------| ||13|12|

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #1366 +/- ## =========================================== - Coverage 67.49% 57.61% -9.89% =========================================== Files 41 41 Lines 3046 3046 =========================================== - Hits 2056 1755 -301 - Misses 990 1291 +301 ```

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