add paths-ignore filter for terraform changes (sigstore#715)

Signed-off-by: Bob Callaway <bcallaway@google.com>

.github/workflows/add-remove-new-fulcio.yaml

@@ -3,6 +3,8 @@ name: Key rotation for Fulcio E2E Tests
 on:
   pull_request:
     branches: [ main ]
+    paths-ignore:
+      - 'terraform/**'
 
 permissions: read-all
 

.github/workflows/fulcio-rekor-kind.yaml

@@ -3,6 +3,8 @@ name: Fulcio&Rekor E2E Tests
 on:
   pull_request:
     branches: [ main ]
+    paths-ignore:
+    - 'terraform/**'
 
 permissions: read-all
 

.github/workflows/test-action-tuf.yaml

@@ -3,6 +3,8 @@ name: Test github action with TUF
 on:
   pull_request:
     branches: [ main ]
+    paths-ignore:
+      - 'terraform/**'
 
 defaults:
   run:

.github/workflows/test-release.yaml

@@ -3,6 +3,8 @@ name: Fulcio&Rekor E2E Tests Using Release
 on:
   pull_request:
     branches: [ main ]
+    paths-ignore:
+      - 'terraform/**'
 
 defaults:
   run: