adjust mocks generation

[M00nF1sh]

adjust mocks generation so that

1. mocks for internal packages are generated within the same package as source file.
2. mocks for 3rd party packages are generated within the global mocks folder.

We do this to avoid cycle imports.

• the test file might to be same as source code in order to test un-exported functions.
• the mocks need to import source code's package if the mocked interface includes data structures from source package
• if test file(in source package) imports mocks package while mock package imports source package, there is a cycle imports.

[codecov-io]

Codecov Report

Merging #1922 (75110e9) into main (f82b48b) will decrease coverage by 0.34%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #1922      +/-   ##
==========================================
- Coverage   49.29%   48.95%   -0.35%     
==========================================
  Files         115      122       +7     
  Lines        6428     6590     +162     
==========================================
+ Hits         3169     3226      +57     
- Misses       2982     3087     +105     
  Partials      277      277              

Impacted Files	Coverage Δ
pkg/ingress/cert_discovery_mocks.go	27.27% <ø> (ø)
pkg/k8s/finalizer_mocks.go	0.00% <ø> (ø)
pkg/k8s/pod_info_repo_mocks.go	0.00% <0.00%> (ø)
pkg/networking/security_group_manager_mocks.go	0.00% <0.00%> (ø)
pkg/networking/subnet_resolver_mocks.go	0.00% <ø> (ø)
pkg/webhook/mutator_mocks.go	100.00% <ø> (ø)
pkg/webhook/validator_mocks.go	100.00% <ø> (ø)
... and 4 more

---

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[M00nF1sh]

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

[kishorj]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kishorj, M00nF1sh

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