Fix python 3.10 support in vendored in cgroupspy

The cgrouppspy is not Python 3.10 compliant due to Iterable
being imported directly from collections.

This is captured in cloudsigma/cgroupspy#13

We fix it in our vendored-in version of cgroupspy until
hopefully new version of it is released.

This is part of the effort needed to implement Python 3.10
compatibility: apache#22050

airflow/_vendor/cgroupspy/interfaces.py

@@ -24,7 +24,7 @@
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 """
-from collections import Iterable
+from collections.abc import Iterable
 from airflow._vendor.cgroupspy.contenttypes import BaseContentType