Replace Go model generation for chaosmesh

Description

Part of #6130

Replace model generation for chaosmesh module with new OpenAPI approach.

[!Note] For extension models there are going to be multiple conflicts with the previously generated code.

Remove build-helper-maven-plugin
Remove maven-antrun-plugin from the generate profile
Remove jsonschema2pojo-maven-plugin from the generate profile
Consolidate all extension models to the same module (certmanager, tekton, and so on all have multiple model generator modules)
Configure the openapi-model-generator-maven-plugin plugin to generate the specific classes.
Remove the go-related files and directories (Makefile, cmd)
Remove invocation from the generateModel.sh script