Use built-in is_terminal instead of is_terminal::is_terminal #9807

Job	Run time
std-lib-and-python-virtualenv (ubuntu-20.04, py)	4m 13s
std-lib-and-python-virtualenv (macos-latest, py)	7m 59s
std-lib-and-python-virtualenv (windows-latest, py)	8m 13s
tests (windows-latest, default)	13m 6s
tests (macos-latest, default)	8m 7s
tests (ubuntu-20.04, default)	6m 25s
tests (ubuntu-20.04, dataframe)	6m 16s
tests (ubuntu-20.04, extra)	9m 35s
fmt-clippy (windows-latest, default)	9m 13s
fmt-clippy (windows-latest, extra)	4m 22s
fmt-clippy (macos-latest, default)	4m 50s
fmt-clippy (macos-latest, extra)	2m 35s
fmt-clippy (ubuntu-20.04, default)	1m 54s
fmt-clippy (ubuntu-20.04, dataframe)	1m 21s
fmt-clippy (ubuntu-20.04, extra)	1m 42s
plugins (windows-latest)	3m 38s
plugins (macos-latest)	2m 54s
plugins (ubuntu-20.04)	1m 21s
	1h 37m 44s

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