[Improvement][ApiServer] Use real existing workerGroups more accurately instead of defaulting to 'default', to avoid ambiguity.

[njnu-seafish]

Search before asking

• I had searched in the issues and found no similar feature requirement.

Description

1，The workerGroupName in the configuration file /usr/local/dolphinscheduler/worker-server/conf/application.yaml is set to g_suyc

worker:
# worker listener port
listen-port: 1234
# worker group name
group: g_suyc

2，The workerGroup management list indeed contains g_suyc and does not have default.

3，However, the system uses the 'default' group in many places by default.

When configuring project preferences：

When creating a task：

When running a workflow：

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct