fix(eslint): add recursive ignorePatterns to parent configs to ignore compiled artifacts and test fixtures when per-package configs are removed

Author: shivanee-p

.eslintrc.json

@@ -1,4 +1,13 @@
 {
   "extends": "./node_modules/gts",
-  "root": true
+  "root": true,
+  "ignorePatterns": [
+    "**/node_modules",
+    "**/build",
+    "**/system-test",
+    "**/test/fixtures",
+    "**/samples/generated",
+    "**/.coverage",
+    "**/coverage"
+  ]
 }

core/generator/gapic-generator-typescript/.eslintrc.json

@@ -1,5 +1,14 @@
 {
-    "extends": "./node_modules/gts",
-    "root": true
+  "extends": "./node_modules/gts",
+  "root": true,
+  "ignorePatterns": [
+    "**/node_modules",
+    "**/build",
+    "**/system-test",
+    "**/test/fixtures",
+    "**/samples/generated",
+    "**/.coverage",
+    "**/coverage"
+  ]
 }