XCOMMONS-2475: Use Expressly instead of Apache EL

Update dependency com.gradle:develocity-maven-extension to v1.23

See also: https://forum.xwiki.org/t/automatic-backport-of-prs-on-branches/16075/

* Add an integration test to test the behavior
* Make the detection of first element rendered more robust.
* Avoid adding group syntax when not needed.
* Add another test to verify that groups are actually added.
* Fix the MessageMacroTest to expect more line breaks - the new line
  breaks are good, "content" is in a new paragraph.

* Remove duplications, fix javadoc, remove deprecated files, and als improve speed of Rendering Tests

* Remove JUnit4-based test framework (not used anymore)

* Fix javadoc + rename the internal RenderingTest class (not supposed to be used in tests)

[Misc] Remove now unused RenderingTestSuite (all tests have now been moved to the JUnit5 equivalent: RenderingTests)

Misc: work on the javadoc of ParserUtils#convertToInline

XRENDERING-759: getDefaultCategory() call does not work on recent macros which directly implement the interface
* fix flicketing test (for real this time)

XRENDERING-759: getDefaultCategory() call does not work on recent macros which directly implement the interface
* fix flicketing test

XRENDERING-759: getDefaultCategory() call does not work on recent macros which directly implement the interface

* (Sonar) Fixed finding: "`@Override` should be used on overriding and implementing methods"

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Co-authored-by: pixeebot[bot] <104101892+pixeebot[bot]@users.noreply.github.com>

* Remove integration tests that depend on Doxia

Translations update from Weblate

Currently translated at 100.0% (7 of 7 strings)

Translation: XWiki Rendering/Content Macro
Translate-URL: https://l10n.xwiki.org/projects/xwiki-rendering/content-macro/zh/