[RELEASE] 11.5.2 - Maintenance Release

This is a maintenance release for TYPO3 11.5, containing:

- [BUGFIX:BP:11.5] Fix error when indexing pages with field
processing instruction categoryUidToHierarchy
- [BUGFIX:BP:11.5] Custom doktype is deleted from solr after saving
with custom queue configuration
- [BUGFIX:BP:11.5] Dont use minimum-stability dev on TYPO3 stable
- [BUGFIX:BP:11.5] Fix value resolution in SOLR_RELATION
- [FEATURE:P:11.5] Add new option manualSortOrderDelimiter for facets
- [BUGFIX:P:11.5] Casting after check
- [TASK] Docker version check on docker image build
- [BUGFIX:P:11.5] Use ConfigurationManager to get typscript in plugin
FlexForm
- [BUGFIX:P:11.5] Exception on search plugin if no Solr connection is
configured
- [BUGFIX:BP:11.5] Fix handling of non existing pages on deletions
- [TASK:BP:11] Verify the record before accessing the pid
- [TASK:BP:11.5] Handle Solr connection exception
- [BUGFIX:BP:11.5] Fix Solr response handling during indexing
- [BUGFIX:BP:11.5] Use plugin namespace as label for flexforms
- [BUGFIX:BP:11.5] Respect indexingPriority in QueueItemRepository
- [BUGFIX:BP:11.5] add empty string as fallback
- [BUGFIX:BP:11.5] use siteLanguage TypoScript object to get language
id
- [BUGFIX:BP:11.5] Sanitize frequent and last searches output
- [BUGFIX:BP:11.5] changed from always picking the 0 array value to
pic
- [BUGFIX:BP:11.5] Avoid getSolrConfiguration() on null
- [TASK:BP:11.5] Disable sql handler
- [BUGFIX:BP:11.5] Avoid PHP 8 warning when page indexing fails
- [BUGFIX:BP:11.5] Ensure record exists before asserting if draft
- [BUGFIX:BP:11.5] Fix usage of null coalescing operator
- [BUGFIX:BP:11.5] return empty string for renderStatic if there is
no content 