build: update to husky v7 to remove nested gitignore (#23196)

Updates to the latest version of Husky v7 which no longer
requires the `.gitignore` file in the `.husky` file.

The `_` folder generated by Husky sometimes resulted in
unnecessary diffs on Windows (due to CRLF line endings).

(cherry picked from commit 78ba3b1)

Author: devversion

.husky/.gitignore

@@ -180,7 +180,7 @@
     "gulp-cli": "^2.3.0",
     "gulp-dart-sass": "^1.0.2",
     "highlight.js": "^10.4.0",
-    "husky": "6.0.0",
+    "husky": "^7.0.1",
     "inquirer": "^8.0.0",
     "jasmine": "^3.6.0",
     "jasmine-core": "^3.6.0",

package.json

@@ -7353,10 +7353,10 @@ https-proxy-agent@^4.0.0:
     agent-base "5"
     debug "4"
 
-husky@6.0.0:
-  version "6.0.0"
-  resolved "https://registry.yarnpkg.com/husky/-/husky-6.0.0.tgz#810f11869adf51604c32ea577edbc377d7f9319e"
-  integrity sha512-SQS2gDTB7tBN486QSoKPKQItZw97BMOd+Kdb6ghfpBc0yXyzrddI0oDV5MkDAbuB4X2mO3/nj60TRMcYxwzZeQ==
+husky@^7.0.1:
+  version "7.0.1"
+  resolved "https://registry.yarnpkg.com/husky/-/husky-7.0.1.tgz#579f4180b5da4520263e8713cc832942b48e1f1c"
+  integrity sha512-gceRaITVZ+cJH9sNHqx5tFwbzlLCVxtVZcusME8JYQ8Edy5mpGDOqD8QBCdMhpyo9a+JXddnujQ4rpY2Ff9SJA==
 
 iconv-lite@0.4.24, iconv-lite@^0.4.24, iconv-lite@^0.4.4, iconv-lite@~0.4.11:
   version "0.4.24"