ECR Keyless access - deps bumped and changed to k8schain

[rashedkvm]

Pull request

What this PR does / why we need it

Tanzu Source Controller on EKS with ECR as a registry and auth against ECR via IAM role, the request fails.

Which issue(s) this PR fixes

Fixes #77

Describe testing done for PR

Manual testing on an EKS cluster with ECR

k get imagerepositories.source.apps.tanzu.vmware.com -A
NAMESPACE   NAME                      IMAGE                                                                                                   URL                                                                                                                                                                                                          READY   REASON   AGE
default     imagerepository-dkrhb     XXXXXXXX/tanzu-hava-app-image@sha256:185ec690a4fa84328ac97b6fe021974c9313859a9a87f3b8a2b8131982544e8f   http://source-controller-manager-artifact-service.source-system.svc.cluster.local./imagerepository/default/imagerepository-dkrhb/185ec690a4fa84328ac97b6fe021974c9313859a9a87f3b8a2b8131982544e8f.tar.gz     True    Ready    17m
default     imagerepository-no-auth   XXXXXXXXXX.dkr.ecr.us-east-2.amazonaws.com/tsc-test-repo:dev                                            http://source-controller-manager-artifact-service.source-system.svc.cluster.local./imagerepository/default/imagerepository-no-auth/185ec690a4fa84328ac97b6fe021974c9313859a9a87f3b8a2b8131982544e8f.tar.gz   True    Ready    17m

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