NEW Add ORM abstraction for "WITH" clauses #1658

Job	Run time
CI / Context	1s
CI / Generate matrix	8s
CI / Check governance	1s
CI / 8.1 prf-low mysql57 phpunit framework-core	4m 53s
CI / 8.1 mysql57 phpunit framework-core	5m 15s
CI / 8.2 mysql80 phpunit framework-core	9m 8s
CI / 8.1 prf-low mysql57 phpunit framework-orm	11m 38s
CI / 8.1 mysql57 phpunit framework-orm	16m 32s
CI / 8.2 mysql80 phpunit framework-orm	13m 10s
CI / 8.1 prf-low mysql57 phpunit cms	2m 1s
CI / 8.1 mysql57 phpunit cms	1m 30s
CI / 8.2 mysql80 phpunit cms	1m 54s
CI / 8.1 mysql57 phplinting	1m 41s
CI / Check unreleased changes	0s
CI / Patch release	0s
	1h 7m 52s

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