IBX-8470: Upgraded codebase to Symfony 6

[alongosz]

Caution

This is a part of bigger set of changes, to be merged together when ready

• ❗ Remove TMP commits before merge ❗

🎫 Issue	IBX-8470

Related PRs:

• IBX-8470: Upgraded codebase to Symfony 6 core#447
• IBX-8470: Bumped Symfony to version 6 doctrine-schema#27
• IBX-8470: Upgraded codebase to Symfony 6 content-forms#78
• IBX-8470: Upgraded codebase to Symfony 6 design-engine#31
• IBX-8470: Upgraded codebase to Symfony 6 rest#138
• IBX-8470: Upgraded codebase to Symfony 6 search#50
• IBX-8470: Upgraded codebase to Symfony 6 user#90
• IBX-8470: Upgraded codebase to Symfony 6 behat#125
• IBX-8470: Upgraded codebase to Symfony 6 http-cache#54
• IBX-8470: Upgraded codebase to Symfony 6 notifications#12
• IBX-8470: Upgraded codebase to Symfony 6 test-core#13
• IBX-8470: Upgraded codebase to Symfony 6 test-rest#9

Description:

This PR bumps Symfony to v6 with necessary codebase upgrades.

Key changes:

• [Composer] Dropped obsolete dependency on ci-scripts
• Moved RichTextTypeExtension out of AdminUI to RichText Bundle
• [Composer] Dropped cyclic dependency on ibexa/fieldtype-richtext
• [Composer] Bumped Symfony packages requirements to ^6.4
• [Composer] Bumped Pagerfanta to v3
• [Composer] Bumped 3rd party translation bundles for Symfony 6
• Aligned codebase with Pagerfanta v3
• [Tests] Upgraded Symfony Forms tests to Symfony 6
• Fixed incorrect type-hinting of Form DTO ContentTypesDeleteData
• Aligned type-hints after making core SearchResult templated
• Rebranded Legacy Pagerfanta View {{KEY_CHANGES}} Template class names
• Defined strict types for FormActionEvent
• Upgraded Symfony Forms Choice Loaders to Symfony 6
• Fixed incorrect type-hinting of Form DTO BookmarkRemoveData
• Aligned NotificationTranslationExtractor with newer version of PhpParser
• Replaced usage of Location::$pathString magic getter in UDWBasedMapper
• Upgraded Symfony validators extension points codebase to Symfony 6
• [Tests] Aligned type-hints after making core SearchResult templated
• [PHPStan] Aligned baseline after the changes

QA:

Sanities in the form of regression tests.

Documentation:

No documentation required.

[sonarqubecloud]

Quality Gate failed

Failed conditions
16.7% Duplication on New Code (required ≤ 3%)

See analysis details on SonarQube Cloud