Bug 1604539 - Update eslint reject-some-requires "devtools/client" configuration r=nchevobbe

Depends on D67605

The eslint rule prevent devtools/client requires can now target all shared/** files
We also exclude devtools-client specifically, since it imports the object-front despite being in devtools/shared.
This file is always used from devtools/client at runtime but is used in many shared & server test suites

Differential Revision: https://phabricator.services.mozilla.com/D67606

--HG--
extra : moz-landing-system : lando

devtools/.eslintrc.js

@@ -86,16 +86,12 @@ module.exports = {
       },
     },
     {
-      // For all server files, prevent requiring devtools/client modules.
-      files: [
-        "server/**",
-        // The rule also applies to all `shared` files, with the exception of
-        // shared/fronts.
-        // This first pattern matches files in a shared subfolder other than "fronts".
-        "shared/!(fronts)/**",
-        // This second pattern matches files directly under shared.
-        "shared/*.**",
-      ],
+      // For all server and shared files, prevent requiring devtools/client
+      // modules.
+      files: ["server/**", "shared/**"],
+      // devtools-client.js is effectively a client file, but it is still loaded
+      // by test suites in devtools/shared and devtools/server.
+      excludedFiles: ["shared/client/devtools-client.js"],
       rules: {
         "mozilla/reject-some-requires": [
           "error",