Add IdentityUserDelegation

[realLiangshiwei]

Checklist

• I fully tested it as developer / designer and created unit / integration tests

[codecov]

Codecov Report

Merging #16066 (9ffb0c7) into dev (82071cd) will increase coverage by 0.01%.
The diff coverage is 59.23%.

@@            Coverage Diff             @@
##              dev   #16066      +/-   ##
==========================================
+ Coverage   49.41%   49.42%   +0.01%     
==========================================
  Files        3383     3389       +6     
  Lines      104684   104970     +286     
==========================================
+ Hits        51725    51886     +161     
- Misses      52959    53084     +125     

Impacted Files	Coverage Δ
.../Abp/Identity/MongoDB/AbpIdentityMongoDbContext.cs	45.45% <0.00%> (-4.55%)	⬇️
...bp/Identity/IdentityUserDelegationManager_Tests.cs	0.00% <0.00%> (ø)
...Core/Migrations/20230324065930_Initial.Designer.cs	0.00% <0.00%> (ø)
...FrameworkCore/Migrations/20230324065930_Initial.cs	0.00% <0.00%> (ø)
.../Migrations/MyProjectNameDbContextModelSnapshot.cs	0.00% <0.00%> (ø)
...Volo/Abp/Identity/IdentityUserDelegationManager.cs	80.55% <80.55%> (ø)
.../Identity/IdentityUserDelegationepository_Tests.cs	96.66% <96.66%> (ø)
...Domain/Volo/Abp/Identity/IdentityUserDelegation.cs	100.00% <100.00%> (ø)
...meworkCore/AbpIdentityEntityFrameworkCoreModule.cs	100.00% <100.00%> (ø)
...workCore/EfCoreIdentityUserDelegationRepository.cs	100.00% <100.00%> (ø)
... and 7 more

... and 2 files with indirect coverage changes

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