sha,message,author_date,committer_date,raw_author,raw_committer,repo,author,committer
798f4d492b7f87172a50a00cf7c4c68e4cbb8b4e,"Update contains_cftime_datetimes to avoid loading entire variable array (#7494)

* Update contains_cftime_datetimes to avoid loading entire variable array

* Update whats-new.rst

* Convert arrays to variable instead for better control

* fix mypy?

* Update common.py

* Update xarray/core/common.py

Co-authored-by: Mathias Hauser <mathause@users.noreply.github.com>

* Update common.py

remove _variable_contains_cftime_datetimes

* Avoid creating variable.

* Add test

* minimize diff

* Update tests.

* address comment

* Fix test

* Fix whats-new

* Fix more tests

* More fixes

* fix iris tests

---------

Co-authored-by: Illviljan <14371165+Illviljan@users.noreply.github.com>
Co-authored-by: Mathias Hauser <mathause@users.noreply.github.com>
Co-authored-by: dcherian <deepak@cherian.net>
Co-authored-by: Deepak Cherian <dcherian@users.noreply.github.com>",2023-03-07T16:10:29Z,2023-03-07T16:10:29Z,b6b6d624d7ea4803cd254805b7cd9b742a6a89aa,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,5179430,19864447