build: install husky in prepare script instead of postinstall

With typicode/husky#890, the recommended way to install husky is in the
`prepare` script instead of the `postinstall`. This commit moves
the husky installation to the `prepare` script to align with the new
recommendation.

package.json

@@ -32,7 +32,8 @@
     "// 3": "yarn ng-dev --help",
     "/ ": "",
     "preinstall": "node tools/yarn/check-yarn.js",
-    "postinstall": "husky install && node scripts/webdriver-manager-update.js && node --preserve-symlinks --preserve-symlinks-main ./tools/postinstall-patches.js",
+    "postinstall": "node scripts/webdriver-manager-update.js && node --preserve-symlinks --preserve-symlinks-main ./tools/postinstall-patches.js",
+    "prepare": "husky install",
     "test-ivy-aot": "bazelisk test --config=ivy --build_tag_filters=-no-ivy-aot,-fixme-ivy-aot --test_tag_filters=-no-ivy-aot,-fixme-ivy-aot",
     "test-non-ivy": "bazelisk test --build_tag_filters=-ivy-only --test_tag_filters=-ivy-only",
     "test-fixme-ivy-aot": "bazelisk test --config=ivy --build_tag_filters=-no-ivy-aot --test_tag_filters=-no-ivy-aot",