Add schema/attach support for Sqlite #21421

Job	Run time
Docs	34s
Smoke (latest, Phpunit)	24s
Unit (7.4, Phpunit)	3m 52s
Smoke (latest, CodingStyle)	32s
Smoke (latest, StaticAnalysis)	32s
Unit (7.4, Phpunit Lowest)	3m 57s
Unit (8.0, Phpunit)	4m 14s
Unit (8.0, Phpunit Lowest)	3m 49s
Unit (8.1, Phpunit)	4m 6s
Unit (8.1, Phpunit Lowest)	4m 0s
Unit (8.2, Phpunit)	3m 53s
Unit (8.2, Phpunit Lowest)	3m 59s
Unit (8.3, Phpunit)	9m 45s
Unit (8.3, Phpunit Lowest)	3m 49s
Unit (latest, Phpunit Burn)	10m 48s
	58m 14s

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