test(@angular/cli): remove ng update --all test

This is guaranteed to fail. Infact the `--all` has been removed in version 11+

Author: alan-agius4

.ng-dev.log

@@ -0,0 +1,8 @@
+####################################################################################################
+Command: ng-dev commit-message restore-commit-message-draft
+Ran at: Thu Jun 24 2021 13:15:43 GMT+0200 (Central European Summer Time)
+LOG:    Skipping commit message restoration attempt
+DEBUG:  A commit message was already provided via the command with a -m or -F flag
+####################################################################################################
+Command ran in 7ms
+Exit Code: 0

tests/legacy-cli/e2e/tests/misc/update-git-clean-subdirectory.ts

@@ -18,7 +18,7 @@ export default async function() {
   await writeFile('../added.ts', 'console.log(\'created\');\n');
   await silentGit('add', '../added.ts');
 
-  const { stderr } = await ng('update', '--all', '--force');
+  const { stderr } = await ng('update', '@angular/cli');
   if (stderr && stderr.includes('Repository is not clean.')) {
     throw new Error('Expected clean repository');
   }