Revert most changes

Signed-off-by: Gabriel Dugny <gabriel.dugny@believe.com>

packages/cli/config/jest.js

@@ -20,7 +20,6 @@ const crypto = require('node:crypto');
 const glob = require('node:util').promisify(require('glob'));
 const { version } = require('../package.json');
 const paths = require('@backstage/cli-common').findPaths(process.cwd());
-const { getWorkspacesPatterns } = require('@backstage/cli-common');
 const {
   getJestEnvironment,
   getJestMajorVersion,
@@ -337,10 +336,11 @@ async function getRootConfig() {
     rejectFrontendNetworkRequests,
   };
 
-  const workspacePatterns = getWorkspacesPatterns(rootPkgJson);
+  const ws = rootPkgJson.workspaces;
+  const workspacePatterns = Array.isArray(ws) ? ws : ws?.packages;
 
   // Check if we're running within a specific monorepo package. In that case just get the single project config.
-  if (workspacePatterns.length === 0 || paths.targetRoot !== paths.targetDir) {
+  if (!workspacePatterns || paths.targetRoot !== paths.targetDir) {
     return getProjectConfig(
       paths.targetDir,
       {