feat: [CI-17517]: Add push-only support for Kaniko-GAR (#147)

* Add push-only support to Kaniko-GAR

* Refactor GAR authentication and crane push to use Application Default Credentials

* Add robust GAR authentication with Docker config and crane options

* GAR authentication setup and remove redundant logging statements

.harness/harness.yaml

@@ -37,7 +37,7 @@ pipeline:
                       identifier: Build
                       spec:
                         connectorRef: Plugins_Docker_Hub_Connector
-                        image: golang:1.22.4
+                        image: golang:1.23.0
                         shell: Sh
                         command: |-
                           go test ./...
@@ -322,7 +322,7 @@ pipeline:
                       identifier: Build_and_Test
                       spec:
                         connectorRef: Plugins_Docker_Hub_Connector
-                        image: golang:1.22.4
+                        image: golang:1.23.0
                         shell: Sh
                         command: |-
                           go test ./...