[Fix][UI Next][V1.0.0-Beta] Added access to the child node function

[labbomb]

Purpose of the pull request

Please refer to the main issue #9461.

Brief change log

Verify this pull request

This pull request is code cleanup without any test coverage.

(or)

This pull request is already covered by existing tests, such as (please describe tests).

(or)

This change added tests and can be verified as follows:

[Amy0104]

LGTM.

[codecov-commenter]

Codecov Report

Merging #9518 (e527096) into dev (1f48601) will increase coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##                dev    #9518   +/-   ##
=========================================
  Coverage     39.90%   39.91%           
- Complexity     4415     4417    +2     
=========================================
  Files           826      826           
  Lines         33253    33253           
  Branches       3683     3683           
=========================================
+ Hits          13270    13273    +3     
+ Misses        18752    18749    -3     
  Partials       1231     1231           

Impacted Files	Coverage Δ
...dolphinscheduler/remote/future/ResponseFuture.java	81.96% <0.00%> (-1.64%)	⬇️
...r/plugin/task/sqoop/parameter/SqoopParameters.java	53.33% <0.00%> (ø)
...e/dolphinscheduler/remote/NettyRemotingClient.java	53.52% <0.00%> (+1.40%)	⬆️
...org/apache/dolphinscheduler/remote/utils/Host.java	40.00% <0.00%> (+2.22%)	⬆️
...er/master/dispatch/host/assign/RandomSelector.java	83.33% <0.00%> (+5.55%)	⬆️

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[sonarcloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

0.0% Coverage
7.9% Duplication

[songjianet]

LGTM