Revive PR: Add HealthChecks.Dapr

[cieciurm]

What this PR does / why we need it:

This PR revives #846

Which issue(s) this PR fixes:

#712

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

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

• Code compiles correctly
• Created/updated tests
• Unit tests passing
• End-to-end tests passing
• Extended the documentation
• Provided sample for the feature

[codecov-commenter]

Codecov Report

Merging #1947 (998da30) into master (3956b01) will increase coverage by 0.02%.
The diff coverage is 76.00%.

❗ Your organization is not using the GitHub App Integration. As a result you may experience degraded service beginning May 15th. Please install the Github App Integration for your organization. Read more.

@@            Coverage Diff             @@
##           master    #1947      +/-   ##
==========================================
+ Coverage   66.46%   66.49%   +0.02%     
==========================================
  Files         250      252       +2     
  Lines        8627     8652      +25     
  Branches      610      614       +4     
==========================================
+ Hits         5734     5753      +19     
- Misses       2741     2746       +5     
- Partials      152      153       +1     

Flag	Coverage Δ
Dapr	14.61% <76.00%> (?)

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

Files Changed	Coverage Δ
src/HealthChecks.Dapr/DaprHealthCheck.cs	33.33% <33.33%> (ø)
...dencyInjection/DaprHealthCheckBuilderExtensions.cs	100.00% <100.00%> (ø)

[sungam3r]

Thanks @cieciurm !