Reuse `Closure` type in `Value::Closure` (#10894) #227

Job	Run time
std-lib-and-python-virtualenv (ubuntu-20.04, py)	4m 9s
fmt-clippy (windows-latest, default)	7m 38s
std-lib-and-python-virtualenv (macos-latest, py)	3m 57s
std-lib-and-python-virtualenv (windows-latest, py)	10m 18s
plugins (windows-latest)	9m 50s
fmt-clippy (windows-latest, extra)	6m 41s
plugins (macos-latest)	5m 39s
fmt-clippy (macos-latest, default)	5m 42s
fmt-clippy (macos-latest, extra)	5m 38s
tests (windows-latest, default)	10m 28s
plugins (ubuntu-20.04)	3m 27s
fmt-clippy (ubuntu-20.04, default)	3m 43s
tests (macos-latest, default)	12m 54s
fmt-clippy (ubuntu-20.04, dataframe)	5m 16s
tests (ubuntu-20.04, default)	9m 23s
fmt-clippy (ubuntu-20.04, extra)	3m 26s
tests (ubuntu-20.04, dataframe)	16m 36s
tests (ubuntu-20.04, extra)	8m 30s
	2h 13m 15s

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