Optimization: Memoize RequiredMemberAttribute search

[SergeiPavlov]

We see in Profiler that .GetCustomAttribute() is a hotspot.
Memoizing it will improve performance.

[SergeiPavlov]

I see this will not work because of "Unloading feature"
CanLoadInstanceOfAssemblyAndUnloadItAfterOnActivatedInModule test

[tillig]

We have all of the reflection-related caches centralized to allow for unloading assembly load contexts. I'm guessing that's why some of those tests are failing.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.52%. Comparing base (b843130) to head (3fe2ddf).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1415      +/-   ##
===========================================
+ Coverage    78.48%   78.52%   +0.03%     
===========================================
  Files          200      200              
  Lines         5703     5713      +10     
  Branches      1168     1168              
===========================================
+ Hits          4476     4486      +10     
  Misses         714      714              
  Partials       513      513              

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[SergeiPavlov]

Thank you.
Refactored to use ReflectionCacheSet

[tillig]

Looks great! Will hold on releasing publicly until we figure out #1414, but you can do a comparison using the MyGet feed https://www.myget.org/F/autofac/api/v3/index.json - a -beta should show up there based on the build here.