Add utils command to migrate iamidentitymappings to EKS access entr…

…ies (#7710)

* Added migrate-to-access-entry cmd structure

* Fix Target Authentication  mode validation

* Added logic to get accessEntries and cmEntries from cluster

* Added logic to make unique list of configmap accessEntries, and stack creation logic

* Added UpdateAuthentication mode and aeEntries filter logic

* Add approve flag check

* Added functionality to remove awsauth after switch to API only

* Adds logic to fetch FullARN of path stripped IAMIdentityMappings

* Updates some info log text

* Adds test case and refactors code

* Removes comments

* Adds taskTree and address PR comments

* Refactors code and Adds exception handling for NoSuchEntityException

* Resolves go.mod and go.sum conflicts

* Doc update for migrate-to-access-entry feature

* Fixed minimum iam policies doc to add permission for iam:GetUser

* Updated access-entries doc at migrate-to-access-entry section

* Fixes failing Migrate To Access Entry Test & go.mod, go.sum

* Amends migrate to access entry documentation

* improve logs and simplify code logic

* add unit tests

* ensure target-auth-mode has a valid value

---------

Co-authored-by: Pankaj Walke <advaitt@amazon.com>
Co-authored-by: Venkat Penmetsa <vpenmets@amazon.com>
Co-authored-by: Venkat Penmetsa <vpenmets@gmail.com>
Co-authored-by: Tibi <110664232+TiberiuGC@users.noreply.github.com>

pkg/actions/accessentry/getter.go

@@ -10,6 +10,12 @@ import (
 	"github.com/weaveworks/eksctl/pkg/awsapi"
 )
 
+//go:generate go run github.com/maxbrunsfeld/counterfeiter/v6 -generate
+//counterfeiter:generate -o fakes/fake_getter.go . GetterInterface
+type GetterInterface interface {
+	Get(ctx context.Context, principalARN api.ARN) ([]Summary, error)
+}
+
 type Getter struct {
 	clusterName string
 	eksAPI      awsapi.EKS