Add a 'set comment' sub-operation to 'alter column' (#344) #1862

Job	Run time
license check	4s
validate examples JSON	17s
dead code check	25s
examples (pg: 14.8, schema: public)	43s
examples (pg: 14.8, schema: non_public)	37s
examples (pg: 15.3, schema: public)	43s
examples (pg: 15.3, schema: non_public)	40s
lint	15s
test (pg: 14.8, schema: public)	46s
examples (pg: 16.0, schema: public)	40s
type generation	8s
test (pg: 14.8, schema: non_public)	51s
examples (pg: 16.0, schema: non_public)	52s
test (pg: 15.3, schema: public)	47s
examples (pg: latest, schema: public)	44s
test (pg: 15.3, schema: non_public)	48s
examples (pg: latest, schema: non_public)	52s
test (pg: 16.0, schema: public)	44s
test (pg: 16.0, schema: non_public)	44s
test (pg: latest, schema: public)	46s
test (pg: latest, schema: non_public)	42s
release	0s
	13m 8s

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