Fix parallel test failure
Added example for distributed plan
Fix SHOW PARTITIONS and dual catalog with include-coordinator=false

Mark dual and information schema as system datasources. Also add more unit tests for disabling coordinator work scheduling
Categorize invalid argument errors to approx_percentile
Fix parsing and formatting of sign expressions
Rename legacy config name in development properties
Deprecate the datasources configuration property

This property, if not set, is now configured automatically at startup based
on the list of installed catalogs.  This will be completely removed later.
Fix tests for datasources change
Add 0.69 release notes
[maven-release-plugin] prepare release 0.69
[maven-release-plugin] prepare for next development iteration
Rewrite EXPLAIN to a VALUES query

This helps avoid bytecode generation failures when plan string is too large due
to max constant pool size being exceeded.
Remove use of dual metadata from interpreter tests
Remove use of dual connector from TestSqlStageExecution
Remove use of dual from TestSqlTaskExecution
Remove use of dual from TestSqlTaskManager
Remove use of dual from query and function tests
Remove use of dual from TestEffectivePredicateExtractor
Remove dual connector
Optimize imports