Merge branch 'hotfix/#6726-#6740-tablegateway-table-alias'

Close #6726
Close #6740
* Fix method argument handling of Predicate/Expression to allow single
non-scalar values (e.g. null, Predicate instances) as only parameter
* Fix typo in Predicate/Predicate
Code cosmetics
Code cosmetics
#6849 - simplified `setParameters` call: `array_slice()` was being re-implemented in userland.
#6849 - adding `@group` annotation to newly introduced tests
Merge branch 'hotfix/#6849-fix-db-predicate-expression-method-argument-handling' into develop

Close #6849
Forward port #6849