feature symfony#53080 [Clock] Return Symfony ClockInterface in ClockSensitiveTrait (ruudk)

This PR was submitted for the 6.4 branch but it was merged into the 7.1 branch instead.

Discussion
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[Clock] Return Symfony ClockInterface in ClockSensitiveTrait

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        |
| License       | MIT

`@nicolas`-grekas I don't understand why the ClockSensitiveTrait::mockTime returns a PSR ClockInterface, instead of a Symfony ClockInterface. Is this done on purpose? Or was this a mistake?

Commits
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1e65347 Return Symfony ClockInterface in ClockSensitiveTrait

Author: fabpot

src/Symfony/Component/Clock/Test/ClockSensitiveTrait.php

@@ -11,7 +11,7 @@
 
 namespace Symfony\Component\Clock\Test;
 
-use Psr\Clock\ClockInterface;
+use Symfony\Component\Clock\ClockInterface;
 use Symfony\Component\Clock\Clock;
 use Symfony\Component\Clock\MockClock;