Chore(github): Add ECR workflow for auth - PLATFORM-2702

.github/CODEOWNERS

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+* @Evanjt1 @jhebb @aflesher @sandbender

.github/actions/action.yml

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+name: build-publish-image
+description: Build and publish Docker image to ECR
+inputs:
+  repository:
+    description: 'ECR repository name'
+    required: true
+  repo_token:
+    description: 'Github token'
+    required: true
+  dockerfile:
+    description: 'Dockerfile file name'
+    required: true
+runs:
+  using: 'composite'
+  steps:
+    - name: Checkout Repo
+      uses: actions/checkout@v3
+
+    - name: Configure AWS Credentials
+      uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: arn:aws:iam::559476808817:role/GithubActionsECRRole
+        aws-region: us-east-1
+
+    - name: Login to AWS ECR
+      id: login-ecr
+      uses: aws-actions/amazon-ecr-login@v2
+
+    - name: Build, tag, and push image to AWS ECR
+      shell: bash
+      env:
+        GITHUB_TOKEN: ${{ inputs.repo_token }}
+        REGISTRY: ${{ steps.login-ecr.outputs.registry }}
+        REPOSITORY: ${{ inputs.repository }}
+        IMAGE_TAG: ${{ github.run_number }}
+        DOCKER_FILE: ${{ inputs.dockerfile }}
+      run: |
+        docker build -f ${DOCKER_FILE} --build-arg GITHUB_TOKEN="${GITHUB_TOKEN}" -t $REGISTRY/$REPOSITORY:$IMAGE_TAG .
+        docker tag $REGISTRY/$REPOSITORY:$IMAGE_TAG $REGISTRY/$REPOSITORY:latest
+        echo "Pushing images to ECR..."
+        docker push $REGISTRY/$REPOSITORY:$IMAGE_TAG
+        docker push $REGISTRY/$REPOSITORY:latest

.github/workflows/build-publish-image.yml

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+name: build-images
+run-name: Build client-as image and push to ECR
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    name: Build main image and push to ECR
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+      contents: read
+      packages: read
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ./.github/actions/build-publish-image
+        with:
+          repository: client-as
+          repo_token: ${{ secrets.TP_BUILDER_REPO_TOKEN }}
+          dockerfile: Dockerfile
+