[HttpKernel] Escape SSI virtual in generated response

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | 
| License       | MIT
| Doc PR        | NA

If a template with an `<!--#inlude -->` tag  is configured with an "virtual" containing a `'` ; the HttpCache will generate invalide php code.

See #11845 for the same issue on `<esi>` tags