[BE] [GHA] Use aws ecr get-login-password (pytorch#67709)

Summary:
Replacing `aws ecr get-login` with `awc ecr get-login-password`, per https://docs.aws.amazon.com/cli/latest/userguide/cliv2-migration.html#cliv2-migration-ecr-get-login

Follow up after the similar change in CircleCI: pytorch#58308

Pull Request resolved: pytorch#67709

Reviewed By: seemethere, janeyx99

Differential Revision: D32119319

Pulled By: malfet

fbshipit-source-id: 0cd0d8f4d81e9981a5f8fbf9b812a9167fd48135

Author: malfet

.github/templates/common.yml.j2

@@ -67,12 +67,10 @@ concurrency:
           AWS_RETRY_MODE: standard
           AWS_MAX_ATTEMPTS: 5
         run: |
-          aws ecr get-login --no-include-email --region us-east-1 > /tmp/ecr-login.sh
-          bash /tmp/ecr-login.sh
-          rm /tmp/ecr-login.sh
+          AWS_ACCOUNT_ID=$(aws sts get-caller-identity|grep Account|cut -f4 -d\")
+          aws ecr get-login-password --region "$AWS_DEFAULT_REGION" | docker login --username AWS \
+              --password-stdin "$AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com"
       - name: Chown workspace
-        env:
-          ALPINE_IMAGE: "308535385114.dkr.ecr.us-east-1.amazonaws.com/tool/alpine"
         run: |
           !{{ pull_docker("${ALPINE_IMAGE}") }}
           # Ensure the working directory gets chowned back to the current user
@@ -97,8 +95,6 @@ concurrency:
         run: .github/scripts/wait_for_ssh_to_drain.sh
       - name: Chown workspace
         if: always()
-        env:
-          ALPINE_IMAGE: "308535385114.dkr.ecr.us-east-1.amazonaws.com/tool/alpine"
         run: |
           # Ensure the working directory gets chowned back to the current user
           docker run --rm -v "$(pwd)":/v -w /v "${ALPINE_IMAGE}" chown -R "$(id -u):$(id -g)" .

.github/templates/docker_builds_ci_workflow.yml.j2

@@ -19,6 +19,10 @@ on:
 {%- endif %}
 !{{ common.concurrency(build_environment) }}
 
+env:
+  ALPINE_IMAGE: "308535385114.dkr.ecr.us-east-1.amazonaws.com/tool/alpine"
+  AWS_DEFAULT_REGION: us-east-1
+
 jobs:
 {% block docker_build +%}
   docker-build: