Merge pull request kubernetes-sigs#2142 from M00nF1sh/release-2.2-1

cherry-pick PR-2137(add PD support) into release-2.2

cut v2.2.1 release (kubernetes-sigs#2105)

cut v2.2.0 release (kubernetes-sigs#2009)

cut v2.1.3 release (kubernetes-sigs#1835)

cut v2.1.2 release (kubernetes-sigs#1812)

sort subnets by id (kubernetes-sigs#1750)

fix the default healthCheck setting for GRPC (kubernetes-sigs#1698)

cut v2.0.1 release (kubernetes-sigs#1641)

fix aws session metrics (kubernetes-sigs#1531)

use numeric target group if available (kubernetes-sigs#1523)

* use numeric port if available

* lookup target port

* update unit tests

* ALB target group name based on target port as well