ECSCNIGitHash, VPCCNIGitHash update to reflect latest commits

[SreeeS]

Summary

This update is to update the git sub modules to reflect the latest commits on amazon-ecs-cni-plugin, amazon-vpc-cni-plugins.

This change also addresses the failed static checks with message: cannot find package "golang.org/x/tools/cmd/cover"
Reference resource: https://pkg.go.dev/golang.org/x/tools/cmd/cover#section-readme

Implementation details

1. Updated submodules to reflect latest commits on amazon-ecs-cni-plugin, amazon-vpc-cni-plugins.
2. Updated plugin_test.go to check for the latest commits on submodules
3. Updated Makefile: Removed go get golang.org/x/tools/cmd/cover Reason: Deprecated for Go releases 1.5 and later

Testing

1. Confirmed the change: updated the git sub modules reflect latest commit on the fork.
2. Tested with git workflow and bot tests

New tests cover the changes: yes

Description for the changelog

Enhancement - amazon-ecs-cni-plugins and amazon-vpc-cni-plugins git submodules to reflect latest commits
Bug - Fixed failed static checks with message: cannot find package "golang.org/x/tools/cmd/cover"

Licensing

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.