test(@angular/cli): move completion command test in own directory

Just re-organizing a bit

(cherry picked from commit 373d380)

Author: alan-agius4

tests/legacy-cli/e2e/tests/misc/completion-prompt.ts renamed to tests/legacy-cli/e2e/tests/commands/completion/completion-prompt.ts

@@ -2,13 +2,13 @@ import { promises as fs } from 'fs';
 import * as os from 'os';
 import * as path from 'path';
 import { env } from 'process';
-import { getGlobalVariable } from '../../utils/env';
+import { getGlobalVariable } from '../../../utils/env';
 import {
   execAndCaptureError,
   execAndWaitForOutputToMatch,
   execWithEnv,
   silentNpm,
-} from '../../utils/process';
+} from '../../../utils/process';
 
 const AUTOCOMPLETION_PROMPT = /Would you like to enable autocompletion\?/;
 const DEFAULT_ENV = Object.freeze({

tests/legacy-cli/e2e/tests/misc/completion-script.ts renamed to tests/legacy-cli/e2e/tests/commands/completion/completion-script.ts

@@ -1,4 +1,4 @@
-import { exec, execAndWaitForOutputToMatch } from '../../utils/process';
+import { exec, execAndWaitForOutputToMatch } from '../../../utils/process';
 
 export default async function () {
   // ng build

tests/legacy-cli/e2e/tests/misc/completion.ts renamed to tests/legacy-cli/e2e/tests/commands/completion/completion.ts

@@ -1,14 +1,13 @@
-import { execFile } from 'child_process';
 import { promises as fs } from 'fs';
 import * as os from 'os';
 import * as path from 'path';
-import { getGlobalVariable } from '../../utils/env';
+import { getGlobalVariable } from '../../../utils/env';
 import {
   execAndCaptureError,
   execAndWaitForOutputToMatch,
   execWithEnv,
   silentNpm,
-} from '../../utils/process';
+} from '../../../utils/process';
 
 const testRegistry = getGlobalVariable('package-registry');