add support for local zone

[M00nF1sh]

This PR add support for local zone

1. The controller will do an additional EC2:DescribeAvailabilityZone API call for each zone to discover zone type. (the result is cached indefinitely, so at most one API call will be called for each zone in entire life of this controller)

Additional Notes:

1. waveLength zone is currently not supported by ELB team, however, this change accounted for waveLengthZone as well, but ELBv2 API will reject the LB creation.

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[codecov-io]

Codecov Report

Merging #1920 (f8792bf) into main (e8eecf8) will increase coverage by 0.63%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##             main    #1920      +/-   ##
==========================================
+ Coverage   48.55%   49.18%   +0.63%     
==========================================
  Files         113      115       +2     
  Lines        6319     6416      +97     
==========================================
+ Hits         3068     3156      +88     
- Misses       2978     2983       +5     
- Partials      273      277       +4     

Impacted Files	Coverage Δ
pkg/networking/subnet_resolver.go	92.16% <76.47%> (-1.12%)	⬇️
pkg/networking/az_info_provider.go	84.61% <84.61%> (ø)
pkg/networking/az_info_provider_mocks.go	100.00% <100.00%> (ø)
pkg/ingress/group.go	100.00% <0.00%> (ø)
webhooks/networking/ingress_validator.go	56.45% <0.00%> (+0.71%)	⬆️
pkg/ingress/group_loader.go	88.40% <0.00%> (+1.24%)	⬆️
pkg/ingress/class_loader.go	86.66% <0.00%> (+4.44%)	⬆️

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[M00nF1sh]

/test pull-aws-load-balancer-controller-e2e-test

[kishorj]

upgrade would require modifying existing IAM permissions. Lets make sure we capture this in our documentation.

/lgtm