Move KMS E2E workflow into main e2e-tests file

Condense the E2E tests into fewer workflow files. There are no unique
conditions that require them to be in separate files. Condensing them
makes them easier to discover, and makes the Actions tab in GitHub
cleaner because there are fewer workflows to sort through.

Signed-off-by: Colleen Murphy <colleenmurphy@google.com>

.github/workflows/e2e-tests.yml

@@ -61,3 +61,49 @@ jobs:
       - name: Run pkcs11 end-to-end tests
         shell: bash
         run: ./test/e2e_test_pkcs11.sh
+
+  e2e-kms:
+    runs-on: ubuntu-latest
+    services:
+      vault:
+        image: hashicorp/vault:latest
+        env:
+          VAULT_DEV_ROOT_TOKEN_ID: root
+        options: >-
+          --health-cmd "VAULT_ADDR=http://127.0.0.1:8200 vault status"
+          --health-interval 1s
+          --health-timeout 5s
+          --health-retries 5
+          --restart always
+        ports:
+          - 8200:8200
+
+    env:
+      VAULT_TOKEN: "root"
+      VAULT_ADDR: "http://localhost:8200"
+      COSIGN_YES: "true"
+      SCAFFOLDING_RELEASE_VERSION: "v0.6.17"
+    steps:
+      - name: Checkout
+        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
+      - uses: cpanato/vault-installer@ac6d910a90d64f78ef773afe83887a35c95245c6 # v1.0.3
+        with:
+          vault-release: '1.14.1'
+
+      - uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
+        with:
+          go-version: '1.21'
+          check-latest: true
+
+      - uses: imjasonh/setup-crane@00c9e93efa4e1138c9a7a5c594acd6c75a2fbf0c # v0.3
+
+      - name: Install cluster + sigstore
+        uses: sigstore/scaffolding/actions/setup@main
+        with:
+          version: ${{ env.SCAFFOLDING_RELEASE_VERSION }}
+
+      - name: enable vault transit
+        run: vault secrets enable transit
+
+      - name: Acceptance Tests
+        run: go test -tags=e2e,kms -v ./test/...