[BUG][JAVA] Multiple SecuritySchemes generates invalid Java code

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

When specifying multiple securitySchemes, spring generator in combination with spring-cloud library generates invalid java code.

openapi-generator version

6.6.0-SNAPSHOT

OpenAPI declaration file content or url

openapi: 3.0.0
info:
  version: 1.0.0
  title: My API
  description: some description
components:
  securitySchemes:
    oAuth2ClientCredentials1:
      type: oauth2
      description: description
      flows:
        clientCredentials:
          tokenUrl: https://example.com/1
          scopes:
            write: allows modifying resources
            read: allows reading resources
    oAuth2ClientCredentials2:
      type: oauth2
      description: description
      flows:
        clientCredentials:
          tokenUrl: https://example.com/2
          scopes:
            write: allows modifying resources
            read: allows reading resources

security:
  - oAuth2ClientCredentials1:
      - read
      - write

paths:
  /test:
    get:
      responses:
        '200':
          description: some description

Generation Details

N/A

Steps to reproduce

• create example.yaml with content OpenAPI spec above
• docker run --rm -v "${PWD}:/local" openapitools/openapi-generator-cli:latest generate -o /local/out -g spring --additional-properties=library=spring-cloud -i /local/example.yaml
• sudo chown -R $USER:$USER out
• cd out
• mvn compile

Maven will return an error such as:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.10.1:compile (default-compile) on project openapi-spring: Compilation failure
[ERROR] /home/arnaud/workspace/ideas/openapi/out/src/main/java/org/openapitools/configuration/ClientConfiguration.java:[52,30] method oAuth2ClientContext() is already defined in class org.openapitools.configuration.ClientConfiguration

Related issues/PRs

Similar issue, but maybe not related since it relates to a different generator:
https://github.com/OpenAPITools/openapi-generator/issues/13031

Suggest a fix

Create example.yaml from the issue and run the documented spring generator command with the spring-cloud library. Inspect the generated ClientConfiguration.java and confirm that multiple security schemes produce duplicate oAuth2ClientContext() methods, then run mvn compile in the generated project. Done means the generated Java project compiles successfully with both security schemes present.