Automation for AWS Organization

Why these changes are being introduced:
We need to deploy/publish automation and the Makefile additions as we
move this application into our AWS Organization.

How this addresses that need:
* Add the three GitHub Actions workflows for dev/stage/prod to
automate publishing the container on PR/Merge/Release
* Remove the stage_ecr_push.yml GitHub Action workflow that is
no longer needed

Side effects of this change:
After this is merged to main, the only way to manage the production
application running in Legacy AWS is to use the "legacy" branch.

Relevant ticket(s):
* https://mitlibraries.atlassian.net/browse/IN-573

.github/workflows/dev-build.yml

@@ -0,0 +1,25 @@
+### This is the Terraform-generated dev-build.yml workflow for the                       ###
+### dspace-submission-service-dev app repository                                         ###
+### If this is a Lambda repo, uncomment the FUNCTION line at the end of the document     ###
+### If the container requires any additional pre-build commands, uncomment and edit      ###
+### the PREBUILD line at the end of the document.                                        ###
+name: Dev Container Build and Deploy
+on:
+  workflow_dispatch:
+  pull_request:
+    branches:
+      - main
+    paths-ignore:
+      - '.github/**'
+
+jobs:
+  deploy:
+    name: Dev Container Deploy
+    uses: mitlibraries/.github/.github/workflows/ecr-shared-deploy-dev.yml@main
+    secrets: inherit
+    with:
+      AWS_REGION: "us-east-1"
+      GHA_ROLE: "dspace-submission-service-gha-dev"
+      ECR: "dspace-submission-service-dev"
+      # FUNCTION: ""
+      # PREBUILD: 

.github/workflows/prod-promote.yml

@@ -0,0 +1,22 @@
+### This is the Terraform-generated prod-promote.yml workflow for the                         ###
+### dspace-submission-service-prod repository.                                                ###
+### If this is a Lambda repo, uncomment the FUNCTION line at the end of the document.         ###
+name: Prod Container Promote
+on:
+  workflow_dispatch:
+  release:
+    types: [published]
+
+jobs:
+  deploy:
+    name: Prod Container Promote
+    uses: mitlibraries/.github/.github/workflows/ecr-shared-promote-prod.yml@main
+    secrets: inherit
+    with:
+      AWS_REGION: "us-east-1"
+      GHA_ROLE_STAGE: dspace-submission-service-gha-stage
+      GHA_ROLE_PROD: dspace-submission-service-gha-prod
+      ECR_STAGE: "dspace-submission-service-stage"
+      ECR_PROD: "dspace-submission-service-prod"
+      # FUNCTION: ""
+

.github/workflows/stage-build.yml

@@ -0,0 +1,25 @@
+### This is the Terraform-generated stage-build.yml workflow for the                     ###
+### dspace-submission-service-stage app repository                                       ###
+### If this is a Lambda repo, uncomment the FUNCTION line at the end of the document     ###
+### If the container requires any additional pre-build commands, uncomment and edit      ###
+### the PREBUILD line at the end of the document.                                        ###
+name: Stage Container Build and Deploy
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - '.github/**'
+
+jobs:
+  deploy:
+    name: Stage Container Deploy
+    uses: mitlibraries/.github/.github/workflows/ecr-shared-deploy-stage.yml@main
+    secrets: inherit
+    with:
+      AWS_REGION: "us-east-1"
+      GHA_ROLE: "dspace-submission-service-gha-stage"
+      ECR: "dspace-submission-service-stage"
+      # FUNCTION: ""
+      # PREBUILD: