Remove `pgroll sql` subcommand #2596

Job	Run time
check ledger	12s
validate examples JSON	11s
dead code check	21s
examples (pg: 14.8, schema: public)	34s
examples (pg: 14.8, schema: non_public)	33s
lint	10s
examples (pg: 15.3, schema: public)	35s
license check	6s
test (pg: 14.8, schema: public)	2m 10s
examples (pg: 15.3, schema: non_public)	36s
examples (pg: 16.4, schema: public)	43s
test (pg: 14.8, schema: non_public)	1m 11s
type generation	14s
examples (pg: 16.4, schema: non_public)	37s
test (pg: 15.3, schema: public)	1m 16s
examples (pg: 17.0, schema: public)	43s
test (pg: 15.3, schema: non_public)	1m 23s
examples (pg: 17.0, schema: non_public)	49s
test (pg: 16.4, schema: public)	1m 30s
examples (pg: latest, schema: public)	46s
test (pg: 16.4, schema: non_public)	1m 17s
examples (pg: latest, schema: non_public)	34s
test (pg: 17.0, schema: public)	1m 30s
test (pg: 17.0, schema: non_public)	1m 22s
test (pg: latest, schema: public)	1m 13s
test (pg: latest, schema: non_public)	1m 24s
release	0s
	22m 0s

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