[BUG][JAVA] @Size not generated in the method parameters which are treated as headers

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• What's the version of OpenAPI Generator used?
• Have you search for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Bounty to sponsor the fix (example)

Description

I'm trying to generate some javax.validation annotations in my generated Spring API files. In the parameters section I use reference to the object. When I try to add a size validation on a parameter by adding minItems or maxItems for example, the generated method does not contain the expected javax.validation @Size annotation

Actual:

@ApiOperation(value = "someValue", nickname = "someNickName", notes = "someNotes", tags={ "someTag", })
    @ApiResponses(value = { 
        @ApiResponse(code = 202, message = "success") })
    @RequestMapping(value = "/someUrl/v1/smth",
        consumes = { "application/json" },
        method = RequestMethod.POST)
    default ResponseEntity<Void> someMethod(@ApiParam(value = "someValueHeaderOne" ,required=true) @RequestHeader(value="HeaderOne", required=true) String headerOne,@ApiParam(value = "someValueHeaderTwo" ,required=true) @RequestHeader(value="HeaderTwo", required=true) UUID headerTwo, @ApiParam(value = "Request Body" ,required=true )  @Valid @RequestBody SomeBody someBody) {
        return getDelegate().someMethod(headerOne, headerTwo, someBody);

Expected:

@ApiOperation(value = "someValue", nickname = "someNickName", notes = "someNotes", tags={ "someTag", })
    @ApiResponses(value = { 
        @ApiResponse(code = 202, message = "success") })
    @RequestMapping(value = "/someUrl/v1/smth",
        consumes = { "application/json" },
        method = RequestMethod.POST)
    default ResponseEntity<Void> someMethod(@ApiParam(value = "someValueHeaderOne" ,required=true) @RequestHeader(value="HeaderOne", required=true) @Size (min=1, max=10) String headerOne,@ApiParam(value = "someValueHeaderTwo" ,required=true) @RequestHeader(value="HeaderTwo", required=true) @Size (min=1, max=10) String headerTwo, @ApiParam(value = "Request Body" ,required=true )  @Valid @RequestBody SomeBody someBody) {
        return getDelegate().someMethod(headerOne, headerTwo, someBody);

When I try this by manually modifying the generated interface, the validation works great and throw errors when I send an empty header

openapi-generator version

4.1.3 (maven plugin). I also tried the 4.3.1 version and the latest version, the result is the same

OpenAPI declaration file content or url

{
  "openapi": "3.0.1",
  "info": {
    "title": "title",
    "description": "description",
    "version": "1.0.0",
    "contact": {
      "name": "name",
      "url": "url",
      "email": "email.com"
    }
  },
  "paths": {
    "/someUrl/v1/smth": {
      "post": {
        "tags": [
          "someMethod"
        ],
        "summary": "summary",
        "description": "description",
        "operationId": "sm",
        "parameters": [
          {
            "$ref": "#/components/parameters/HeaderOne"
          },
          {
            "$ref": "#/components/parameters/HeaderTwo"
          }
        ],
        "requestBody": {
          "description": "Request Body",
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/SomeBody"
              }
            }
          },
          "required": true
        },
        "responses": {
          "202": {
            "description": "success"
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "SomeBody": {
        "type": "object",
        "required": [
          "id"
        ],
        "properties": {
          "id": {
            "type": "string",
            "example": "123",
            "description": "description"
          }
        }
      }
    },
    "parameters": {
      "HeaderOne": {
        "name": "HeaderOne",
        "in": "header",
        "description": "description",
        "required": true,
        "schema": {
          "type": "string",
          "minLength": 1,
          "maxLength": 10
        }
      },
      "HeaderTwo": {
        "name": "HeaderTwo",
        "in": "header",
        "description": "description",
        "required": true,
        "schema": {
          "type": "string",
          "minLength": 1,
          "maxLength": 10
        }
      }
    }
  }
}

Generation Details

                 <execution>
                        <id>generate-sources-client</id>
                        <phase>generate-sources</phase>
                        <goals>
                            <goal>generate</goal>
                        </goals>
                        <configuration>
                            <inputSpec>${project.basedir}/conf/swagger/smth.json</inputSpec>
                            <generatorName>spring</generatorName>
                            <generateApiTests>false</generateApiTests>
                            <generateApiDocumentation>false</generateApiDocumentation>
                            <generateModelTests>false</generateModelTests>
                            <generateModelDocumentation>false</generateModelDocumentation>
                            <apiPackage>${my.package}.api.smth</apiPackage>
                            <modelPackage>${my.package}.api.smth.model</modelPackage>
                            <library>spring-boot</library>
                            <configOptions>
                                <java8>true</java8>
                                <library>resttemplate</library>
                                <library>spring-boot</library>
                                <delegatePattern>true</delegatePattern>
                                <dateLibrary>java8-offsetdatetime</dateLibrary>
                                <performBeanValidation>true</performBeanValidation>
                                <useBeanValidation>true</useBeanValidation>
                                <useTags>true</useTags>
                            </configOptions>
                            <environmentVariables>
                                <supportingFiles>ApiUtil.java</supportingFiles>
                            </environmentVariables>
                        </configuration>
                    </execution>

Related issues/PRs

This could be related to this issue - https://github.com/OpenAPITools/openapi-generator/issues/4122

Reproduce the issue with the provided OpenAPI 3.0.1 document using the Spring generator and the performBeanValidation and useBeanValidation settings. Compare generated API method parameters for the referenced headers with the expected @Size output; done when minLength and maxLength produce the required annotations on both headers and the behavior is covered by a regression test.