feat(client): removing hostname resolution fallback when the IP address check fails

[gaius-qi]

Description

This pull request makes improvements to the GetResolveSchedulerAddrs function in the dynconfig_manager.go file by simplifying the health check logic and removing redundant code.

Codebase simplification:

• client/config/dynconfig_manager.go: Removed redundant checks for the scheduler's host address and simplified the logic to only check the scheduler's IP address. This change reduces the complexity and potential duplication in the health check process.

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov]

Codecov Report

Attention: Patch coverage is 57.14286% with 3 lines in your changes missing coverage. Please review.

Project coverage is 34.51%. Comparing base (4e02af6) to head (f98be14).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
client/config/dynconfig_manager.go	57.14%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3936      +/-   ##
==========================================
- Coverage   34.55%   34.51%   -0.05%     
==========================================
  Files         339      339              
  Lines       39956    39943      -13     
==========================================
- Hits        13807    13785      -22     
- Misses      25244    25249       +5     
- Partials      905      909       +4     

Flag	Coverage Δ
unittests	34.51% <57.14%> (-0.05%)	⬇️

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

Files with missing lines	Coverage Δ
client/config/dynconfig_manager.go	50.26% <57.14%> (-4.69%)	⬇️

... and 2 files with indirect coverage changes

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[BruceAko]

lgtm

[chlins]

lgtm