Add docker ecr login plugin as tools (#792)

Docker doesn't install this by default anymore. Adding it for easy
install for new hires.

tools/docker-credential-ecr-login/docker-credential-ecr-login.test.ts

@@ -0,0 +1,12 @@
+import { makeToolTestConfig, toolTest } from "tests";
+
+toolTest({
+  toolName: "docker-credential-ecr-login",
+  toolVersion: "0.8.0",
+  testConfigs: [
+    makeToolTestConfig({
+      command: ["docker-credential-ecr-login", "-v"],
+      expectedOut: "Version:    0.8.0",
+    }),
+  ],
+});

tools/docker-credential-ecr-login/plugin.yaml

@@ -0,0 +1,24 @@
+version: 0.1
+downloads:
+  - name: docker-credential-ecr-login
+    executable: true
+    downloads:
+      - os:
+          linux: linux
+          macos: darwin
+        cpu:
+          x86_64: amd64
+          arm_64: arm64
+        url: https://amazon-ecr-credential-helper-releases.s3.us-east-2.amazonaws.com/${version}/${os}-${cpu}/docker-credential-ecr-login
+      - os:
+          windows: windows
+        cpu:
+          x86_64: amd64
+          arm_64: arm64
+        url: https://amazon-ecr-credential-helper-releases.s3.us-east-2.amazonaws.com/${version}/windows-${cpu}/docker-credential-ecr-login.exe
+tools:
+  definitions:
+    - name: docker-credential-ecr-login
+      download: docker-credential-ecr-login
+      known_good_version: 0.8.0
+      shims: [docker-credential-ecr-login]