Tabulator aggregators: allow nested dict, fix data aggregation #12195

Job	Run time
Pixi lock	6s
Setup workflow	10s
Run pre-commit	30s
type:test-type:ubuntu-latest	1m 11s
ui:test-ui:ubuntu-latest	16m 8s
core:test-core:ubuntu-latest	1m 43s
unit:test-310:ubuntu-latest	7m 36s
ui:test-ui:macos-latest	14m 25s
core:test-minimum:ubuntu-latest	1m 48s
unit:test-312:ubuntu-latest	8m 52s
ui:test-ui:windows-latest	27m 42s
unit:test-310:macos-latest	6m 56s
unit:test-312:macos-latest	8m 20s
unit:test-310:windows-latest	16m 53s
unit:test-312:windows-latest	18m 24s
result:test	1s
	2h 10m 45s

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