change: Convert direct QuantumTask references to generics

[speller26]

Issue #, if available:

Description of changes:

Treat some base classes as generic to make IDE hints more helpful. Without this change, the IDE might complain about methods and properties using the wrong types (like AwsQuantumTask instead of QuantumTask).

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (4113a24) to head (503f73d).

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #1139   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          162       162           
  Lines        10458     10462    +4     
  Branches      1296      1296           
=========================================
+ Hits         10458     10462    +4     

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[AbeCoull]

nit: I think it would be good to have a description and some information (https://typing.python.org/en/latest/reference/generics.html) for better visibility to others that may look at the PR.

^ I am guilty of not doing the above. I'll be working on making sure the descriptions are properly filled.