minor #27886 [Form] Removed .form-control-label class. (vudaltsov)
minor #27886 [Form] Removed .form-control-label class. (vudaltsov)

This PR was squashed before being merged into the 3.4 branch (closes #27886).

Discussion
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[Form] Removed .form-control-label class.

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

There is no such a class neither in [bootstrap 4.0](https://getbootstrap.com/docs/4.0/components/forms/#form-controls) nor in [bootstrap 4.1](https://getbootstrap.com/docs/4.1/components/forms/#form-controls).

Commits
-------

cb3e712698 [Form] Removed .form-control-label class.

symfony/twig-bridge,symfony/TwigBridge