feat(core): remove mocked testing util (#3333)

BREAKING CHANGE:

Starting from Jest 27.4, `mocked` has been integrated into Jest repo.

Co-authored-by: anh.pham <anh.pham@cm.com>

Author: ahnpnl

e2e/__tests__/__snapshots__/coverage-report.test.ts.snap

@@ -4,24 +4,24 @@ exports[`outputs coverage report with \`isolatedModules: false\` 1`] = `
 -------------------------|---------|----------|---------|---------|-------------------
 File                     | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 
 -------------------------|---------|----------|---------|---------|-------------------
-All files                |   81.25 |        0 |   33.33 |   90.91 |                   
+All files                |   81.25 |        0 |   33.33 |    90.9 |                   
  file.js                 |     100 |      100 |     100 |     100 |                   
  jest-isolated.config.js |       0 |      100 |     100 |       0 | 2                 
  other-file.js           |     100 |      100 |     100 |     100 |                   
  sum-dependency.ts       |      75 |        0 |       0 |     100 | 3                 
- sum.ts                  |   88.89 |      100 |      50 |     100 |                   
+ sum.ts                  |   88.88 |      100 |      50 |     100 |                   
 -------------------------|---------|----------|---------|---------|-------------------
 `;
 
 exports[`outputs coverage report with \`isolatedModules: true\` 1`] = `
 -------------------------|---------|----------|---------|---------|-------------------
 File                     | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 
 -------------------------|---------|----------|---------|---------|-------------------
-All files                |   81.25 |        0 |   33.33 |   90.91 |                   
+All files                |   81.25 |        0 |   33.33 |    90.9 |                   
  file.js                 |     100 |      100 |     100 |     100 |                   
  jest-isolated.config.js |       0 |      100 |     100 |       0 | 2                 
  other-file.js           |     100 |      100 |     100 |     100 |                   
  sum-dependency.ts       |      75 |        0 |       0 |     100 | 3                 
- sum.ts                  |   88.89 |      100 |      50 |     100 |                   
+ sum.ts                  |   88.88 |      100 |      50 |     100 |                   
 -------------------------|---------|----------|---------|---------|-------------------
 `;