Fix InMemoryBroker to use startup and shutdown middleware hooks

[PythonFZ]

A copy/paste approach + test similar to #358

Instead of relying on super calls this PR just copy + pastes

taskiq/taskiq/abc/broker.py

Lines 196 to 198 in 9f8db96

	formiddlewareinself.middlewares:
	ifmiddleware.__class__.startup!=TaskiqMiddleware.startup:
	awaitmaybe_awaitable(middleware.startup())

and

taskiq/taskiq/abc/broker.py

Lines 217 to 219 in 9f8db96

	formiddlewareinself.middlewares:
	ifmiddleware.__class__.shutdown!=TaskiqMiddleware.shutdown:
	awaitmaybe_awaitable(middleware.shutdown())

into the methods of class InMemoryBroker(AsyncBroker) and adds a simple test case checking ensuring startup and shutdown work and the order of execution is correct.

[PythonFZ]

@s3rius Thanks for approving the PR. Could you re-run the CI / merge main again. The error doesn't seem to be related to the changed I made.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.06%. Comparing base (9f8db96) to head (a62189e).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

@@ Coverage Diff @@## master #629 +/- ##
==========================================
+ Coverage 79.79% 80.06% +0.26% 
==========================================
Files 69 69 Lines 2529 2538 +9 ==========================================
+ Hits 2018 2032 +14 + Misses 511 506 -5 

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