[JAVA] Skipping alias models is hardcoded to the `java` and `inflector` languages

Description

As Java does not supporting alias types, any APIs which use these types will get the base type of the alias. In DefaultGenerator.java, there is code to skip the generation of model files for these aliased types, but this is hardcoded to the java and inflector languages. Any other Java-based generator with aliased types will produced non-compiling empty models.

Swagger-codegen version

Latest from 3.0.0 branch

Swagger declaration file content or url

openapi: 3.0.0
components:
  schemas:
    Int32:
      format: int32
      type: integer
info:
  version: 1.0.0
  title: Test
  license:
    name: MIT
paths:
  /test/{id}:
    get:
      operationId: getById
      parameters:
      - in: path
        name: id
        required: true
        schema:
          $ref: '#/components/schemas/Int32'
      responses:
        '200':
          description: success

Command line used for generation

java -jar swagger-codegen/modules/swagger-codegen-cli/target/swagger-codegen-cli.jar generate -i test.yaml -l jaxrs-resteasy -o test

Steps to reproduce

Generate a project with a Java language other than java or inflector (e.g. jaxrs-resteasy)

Related issues/PRs

None

Suggest a fix/enhancement

See PR #8374

Start in modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultGenerator.java, especially the alias-model handling around lines 379 and 1025. Reproduce the issue with the provided OpenAPI document and jaxrs-resteasy command, then review PR #8374. Done means other Java-based generators no longer produce empty, non-compiling models for aliased types.