Use this->t instead of t

[chrfritsch]

Description

It checks if a t() call can be converted to $this->t()

To Test

• Add steps to test this feature

Drupal.org issue

Provide a link to the issue from https://www.drupal.org/project/rector/issues. If no issue exists, please create one and link to this PR.

[tobiasbaehr]

There is already a rule. Perhaps the rule can be reused.

https://github.com/rectorphp/rector/blob/main/docs/rector_rules_overview.md#funccalltomethodcallrector