[WIP] Add dapr http client extensions

[karoldeland]

Description

Please explain the changes you've made

As mentioned in #632, basic implementation to see if it's a good idea or not.

Issue reference

We strive to have all PR being opened based on an issue, where the problem or feature have been discussed prior to implementation.

Please reference the issue this PR will close: #632

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation

[ghost]

All CLA requirements met.

[codecov]

Codecov Report

Merging #633 (0d05e81) into master (c401452) will increase coverage by 18.25%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           master     #633       +/-   ##
===========================================
+ Coverage   47.77%   66.03%   +18.25%     
===========================================
  Files         125      125               
  Lines        4130     4139        +9     
  Branches      460      462        +2     
===========================================
+ Hits         1973     2733      +760     
+ Misses       2050     1282      -768     
- Partials      107      124       +17     

Flag	Coverage Δ
net5	47.66% <0.00%> (-0.11%)	⬇️
netcoreapp3.1	66.03% <0.00%> (+18.25%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...Dapr.AspNetCore/DaprServiceCollectionExtensions.cs	56.00% <0.00%> (-31.50%)	⬇️
src/Dapr.Actors/Builder/MethodDispatcherBuilder.cs	74.31% <0.00%> (+0.45%)	⬆️
src/Dapr.Actors/Runtime/ActorTypeInformation.cs	40.00% <0.00%> (+2.50%)	⬆️
src/Dapr.Actors/Runtime/ActorManager.cs	50.98% <0.00%> (+5.22%)	⬆️
src/Dapr.Actors/Description/MethodDescription.cs	69.04% <0.00%> (+9.52%)	⬆️
src/Dapr.Actors/Builder/InterfaceDetailsStore.cs	89.18% <0.00%> (+10.81%)	⬆️
src/Dapr.Actors/Client/ActorProxyOptions.cs	100.00% <0.00%> (+11.11%)	⬆️
...tors/Communication/ActorMessageHeaderSerializer.cs	54.71% <0.00%> (+11.32%)	⬆️
...Actors/Communication/ActorDataContractSurrogate.cs	12.50% <0.00%> (+12.50%)	⬆️
.../Dapr.Actors/Builder/MethodBodyTypesBuildResult.cs	100.00% <0.00%> (+13.33%)	⬆️
... and 42 more

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[rynowak]

Closing this as discussed in the issue - we decided not to proceed.