[BUG][JAVA] Generate duplicated Java file (with number sufix) with incorrect class name

Description

Generates 2 classes with compilation errors.

• ExampleMYProperty.java and the class name is ExampleMYProperty
• ExampleMyproperty0.java and the class name is ExampleMyproperty.

The property name "myproperty" collides with the name of the schema component: "Example_MYProperty"
With another property name, for example "amyproperty" it will work and it will create 2 Java files with correct class name:

• ExampleAmyproperty.java
• ExampleMYProperty.java

In versions <=7.8.0 it only creates one Java file with compilation error, the class name has the first 'y' in lower case.
ExampleMYProperty.java -->class name ExampleMyproperty

openapi-generator version

7.10.0 openapi-generator-maven-plugin

OpenAPI declaration file content or url

{
    "openapi": "3.0.1",
    "info": {
        "title": "Issue test case",
        "version": "1.0"
    },
    "paths": {
        "/api/test": {
            "post": {
                "tags": ["Tag1"],
                "operationId": "testOperation",
                "responses": {
                    "200": {
                        "description": "OK",
                        "content": {
                            "*/*": {
                                "schema": {
                                    "$ref": "#/components/schemas/Example"
                                }
                            }
                        }
                    }
                }
            }
        }
    },
    "components": {
        "schemas": {
            "Example": {
                "type": "object",
                "properties": {
                    "myproperty": {
                        "nullable": true,
                        "oneOf": [
                            {
                                "$ref": "#/components/schemas/Example_MYProperty"
                            }
                        ]
                    }
                }
            },
            "Example_MYProperty": {
                "type": "object",
                "properties": {
                    "dcliteral": {
                        "type": "string",
                        "nullable": true
                    }
                }
            }
        }
    }
}

Generation Details

Steps to reproduce

mvn clean generate-sources

<plugin>
  <groupId>org.openapitools</groupId>
  <artifactId>openapi-generator-maven-plugin</artifactId>
  <version>7.10.0</version>
  <executions>
    <execution>
      <goals>
        <goal>generate</goal>
      </goals>
      <configuration>
        <inputSpec>...</inputSpec>
        <generatorName>java</generatorName>
        <configOptions>
          <delegatePattern>true</delegatePattern>
          <interfaceOnly>true</interfaceOnly>
        </configOptions>
      </configuration>
    </execution>
  </executions>
</plugin>

Start by running the provided mvn clean generate-sources reproduction with the Java generator and inspect the generated files and class names for the Example and Example_MYProperty schemas. Done means the generator produces compilable Java files with matching class and filename names, while the existing amyproperty case remains correct.