[FLINK-37126] Add Validator for Autoscaler

[huyuanfeng2018]

What is the purpose of the change

Add Validator for Autoscler, Facilitates StandaloneAutoscaler to detect configuration anomalies in advance

Brief change log

• Migrate the verification part of Autoscaler in DefaultAutoscalerValidator to the Autoscaler module
• Verify the Autoscaler config separately in StandaloneAutoscaler. If there are illegal parameters, report them through events.

Verifying this change

This change added tests and can be verified as follows:

• add StandaloneAutoscalerValidatorTest Used to verify parameter verification under standloneAutoscaler
• The old test cases cover the test for Autoscaler parameter verification under the operator

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): ( no)
• The public API, i.e., is any changes to the CustomResourceDescriptors: (no)
• Core observer or reconciler logic that is regularly executed: (no)

Documentation

• Does this pull request introduce a new feature? (no)
• If yes, how is the feature documented? (not documented)