Removing corepack usage from else clause (#11299)

* Removing corepack usage from else clause

* Fixing an rspec failure.

* Removing the .npmrc file changes, as mark already fixed it.

* Removing unnecessay comments.

* Reverting last change.

---------

Co-authored-by: “Thavachelvam <“thavaahariharangit@git.com”>

npm_and_yarn/lib/dependabot/npm_and_yarn/helpers.rb

@@ -324,8 +324,8 @@ def self.run_npm_command(command, fingerprint: command)
           package_manager_run_command(NpmPackageManager::NAME, command, fingerprint: fingerprint)
         else
           Dependabot::SharedHelpers.run_shell_command(
-            "corepack npm #{command}",
-            fingerprint: "corepack npm #{fingerprint}"
+            "npm #{command}",
+            fingerprint: "npm #{fingerprint}"
           )
         end
       end