Vectorized hash grouping by a single text column #27411

Job	Run time
matrixbuilder	8s
PG14.15 Debug ubuntu-22.04	14m 21s
PG15.10 Debug ubuntu-22.04	14m 0s
PG16.6 Debug ubuntu-22.04	13m 54s
PG17.2 Debug ubuntu-22.04	14m 28s
PG17.2 Release macos-13	10m 12s
PG17.2 ReleaseWithoutTelemetry ubuntu-22.04	12m 3s
PG16.6 Flaky Check Debug ubuntu-22.04	7m 20s
PG17.2 Flaky Check Debug ubuntu-22.04	6m 57s
	1h 33m 23s

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