Add concept of column readOnly to advancedManyToManyRelation #459

Job	Run time
setup-matrix	5s
codeception-tests (8.3, mariadb:10.7, highest, false) / Codeception tests	44s
codeception-tests (8.3, mariadb:10.7, highest, 11.x-dev as 11.99.9, true) / Codeception tests	48s
codeception-tests (8.1, mariadb:10.7, lowest, false) / Codeception tests	59s
	2m 36s

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