XRENDERING-746: When there are two spans with metadata nested in each other, the metadata attributes aren't cleaned

* Simplify the code using ArrayUtils.contains()

* Improve the description of the test cases.

XRENDERING-746: When there are two spans with metadata nested in each other, the metadata attributes aren't cleaned

* Consider any element that has the class as metadata, don't require
  that it is the only class.
* Remove just the metadata class from the classes during cleanup.

* Improve the wording of the comment explaining the added code.

* Also protect against extra macro end markers inside the macro content.

* Protect parsing against content marked as non-generated content
  outside macro markers by ignoring the metadata in case there is no
  macro context.

Bumps com.gradle:develocity-maven-extension from 1.21.1 to 1.21.2.

---
updated-dependencies:
- dependency-name: com.gradle:develocity-maven-extension
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Remove the use of System.properties as system properties starting with "xwiki.test.ui." are never available.

Bumps com.gradle:develocity-maven-extension from 1.21 to 1.21.1.

---
updated-dependencies:
- dependency-name: com.gradle:develocity-maven-extension
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

* Finish the move

* Fix doc

* Fix regression

* Fix expected outcomes in integration tests.

* keep the log but at debug level

Merge pull request #295 from xwiki/dependabot/maven/com.gradle-common-custom-user-data-maven-extension-1.13

Bumps [com.gradle:common-custom-user-data-maven-extension](https://github.com/gradle/common-custom-user-data-maven-extension) from 1.12.5 to 1.13.
- [Release notes](https://github.com/gradle/common-custom-user-data-maven-extension/releases)
- [Commits](https://github.com/gradle/common-custom-user-data-maven-extension/compare/v1.12.5...v1.13

)

---
updated-dependencies:
- dependency-name: com.gradle:common-custom-user-data-maven-extension
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

* Extend the fix for format blocks to group blocks.
* Add a test case.