fix tests for remove Profiler

[darkdef]

Q	A
Is bugfix?	✔️
New feature?	✔️
Breaks BC?	✔️

[what-the-diff]

• The profiler is now an interface.
• A new method createProfiler() was added to the test class, which creates a mock of ProfilerInterface and returns it for use in tests.
• In all places where DbHelper::getProfiler() used to be called, we are now calling $this->createProfile(). This allows us to have more control over what happens when profiling is enabled during testing (e.g., if we want our own implementation).