build: ignore unrelated workflow changes in slow Actions tests

test-asan and test-macos are very slow and tend to get backed up. While
I'm literally waiting hours right now for test-macos to finish so I can
land a PR, I'm opening this pull request to have it be skipped when
things other than its own workflow file are the only changes in the PR.

.github/workflows/test-asan.yml

@@ -3,23 +3,27 @@ name: test-asan
 on:
   pull_request:
     types: [opened, synchronize, reopened, ready_for_review]
-    paths-ignore:
-      - '.mailmap'
-      - '**.md'
-      - 'AUTHORS'
-      - 'doc/**'
+    paths:
+      - !'.github/*'
+      - '.github/workflows/test-asan.yml'
+      - !'.mailmap'
+      - !'**.md'
+      - !'AUTHORS'
+      - !'doc/**'
   push:
     branches:
       - master
       - main
       - canary
       - v[0-9]+.x-staging
       - v[0-9]+.x
-    paths-ignore:
-      - '.mailmap'
-      - '**.md'
-      - 'AUTHORS'
-      - 'doc/**'
+    paths:
+      - !'.github/*'
+      - '.github/workflows/test-asan.yml'
+      - !'.mailmap'
+      - !'**.md'
+      - !'AUTHORS'
+      - !'doc/**'
 
 env:
   PYTHON_VERSION: '3.10'

.github/workflows/test-macos.yml

@@ -3,23 +3,27 @@ name: test-macOS
 on:
   pull_request:
     types: [opened, synchronize, reopened, ready_for_review]
-    paths-ignore:
-      - '.mailmap'
-      - '**.md'
-      - 'AUTHORS'
-      - 'doc/**'
+    paths:
+      - !'.github/*'
+      - '.github/workflows/test-macos.yml'
+      - !'.mailmap'
+      - !'**.md'
+      - !'AUTHORS'
+      - !'doc/**'
   push:
     branches:
       - master
       - main
       - canary
       - v[0-9]+.x-staging
       - v[0-9]+.x
-    paths-ignore:
-      - '.mailmap'
-      - '**.md'
-      - 'AUTHORS'
-      - 'doc/**'
+    paths:
+      - !'.github/*'
+      - '.github/workflows/test-macos.yml'
+      - !'.mailmap'
+      - !'**.md'
+      - !'AUTHORS'
+      - !'doc/**'
 
 env:
   PYTHON_VERSION: '3.10'