Add interleaved weighted round-robin and alias-method loadbalancer

[NX-Official]

Add two algorithm of loadbalancer : interleaved weighted round-robin(iwrr) and alias method from cloudwego/kitex.

ref: cloudwego/kitex#1199
ref: cloudwego/kitex#1019

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 87.96992% with 16 lines in your changes are missing coverage. Please review.

Project coverage is 47.73%. Comparing base (ae70398) to head (de6b703).
Report is 1 commits behind head on main.

Files	Patch %	Lines
cluster/loadbalance/aliasmethod/alias_method.go	88.46%	4 Missing and 2 partials ⚠️
cluster/loadbalance/iwrr/iwrr.go	89.47%	3 Missing and 3 partials ⚠️
cluster/loadbalance/aliasmethod/loadbalance.go	83.33%	1 Missing and 1 partial ⚠️
cluster/loadbalance/iwrr/loadbalance.go	83.33%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2606      +/-   ##
==========================================
+ Coverage   47.55%   47.73%   +0.17%     
==========================================
  Files         336      341       +5     
  Lines       24839    24994     +155     
==========================================
+ Hits        11813    11930     +117     
- Misses      11877    11910      +33     
- Partials     1149     1154       +5     

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[justxuewei]

Thanks for your contribution, @NX-Official! No need to add Reapply in your commit title and your PR's title.

[chickenlj]

LGTM.

Is there any documentation describing the advantages of these strategies?

[NX-Official]

Can we merge this PR or there has something else to do ?

[justxuewei]

There is an issue:

Is there any documentation describing the advantages of these strategies?

Could you add some comments to docs.go? For example, a Wikipedia link that introduces those algorithms.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
11.5% Duplication on New Code

See analysis details on SonarCloud

[justxuewei]

Lgtm, thanks!

[FinalT]

LGTM.