[BUG] [Typescript] Body property is named with the type name

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?

Description

See examples below

openapi-generator version

5.0.0-SNAPSHOT but I have the bug since the 5.0.0beta docker image.

OpenAPI declaration file content or url

openapi: 3.0.0
info:
    title: entity-manager
    version: unknown
paths:
    /companies/defaults:
        post:
            parameters: []
            responses:
                '200':
                    description: Ok
                    content:
                        application/json:
                            schema:
                                type: object
                                properties:
                                    status: {type: string, enum: [success]}
                                    program: {type: string}
                                    version: {type: string}
                                    datetime: {type: string}
                                    code: {type: number}
                                    message: {type: string}
                                required:
                                    - status
                                    - program
                                    - version
                                    - datetime
                                    - message
            tags:
                - Company
            requestBody:
                required: true
                content:
                    application/json:
                        schema:
                            $ref: '#/components/schemas/Partial__roleId-string--resourceGroupIds-string-Array--__'
            operationId: set-company-defaults
components:
    schemas:
        Partial__roleId-string--resourceGroupIds-string-Array--__:
            type: object
            properties:
                roleId:
                    type: string
                resourceGroupIds:
                    type: array
                    items:
                        type: string

Generation Details

docker run --rm -v "${PWD}:/local" openapitools/openapi-generator-cli:latest generate \
            --additional-properties=useSingleRequestParameter=true,enumPropertyNaming=UPPERCASE \
            -i /local/swagger.yaml \
            -g typescript-axios \
            -o /local/client

Results in:

/**
 * Request parameters for setCompanyDefaults operation in CompanyApi.
 * @export
 * @interface CompanyApiSetCompanyDefaultsRequest
 */
export interface CompanyApiSetCompanyDefaultsRequest {
    /**
     * 
     * @type {PartialRoleIdStringResourceGroupIdsStringArray}
     * @memberof CompanyApiSetCompanyDefaults
     */
    readonly partialRoleIdStringResourceGroupIdsStringArray: PartialRoleIdStringResourceGroupIdsStringArray
}

/**
 * CompanyApi - object-oriented interface
 * @export
 * @class CompanyApi
 * @extends {BaseAPI}
 */
export class CompanyApi extends BaseAPI {
    /**
     * 
     * @param {CompanyApiSetCompanyDefaultsRequest} requestParameters Request parameters.
     * @param {*} [options] Override http request option.
     * @throws {RequiredError}
     * @memberof CompanyApi
     */
    public setCompanyDefaults(requestParameters: CompanyApiSetCompanyDefaultsRequest, options?: any) {
        return CompanyApiFp(this.configuration).setCompanyDefaults(requestParameters.partialRoleIdStringResourceGroupIdsStringArray, options).then((request) => request(this.axios, this.basePath));
    }
}

Where we can see we have CompanyApiSetCompanyDefaultsRequest.partialRoleIdStringResourceGroupIdsStringArray instead of CompanyApiSetCompanyDefaultsRequest.body.

Reproduce the report with swagger.yaml and the provided Docker command using the typescript-axios generator. Inspect the generated CompanyApi request parameter and trace why the request-body property uses the schema-derived name; done means it is exposed as body while preserving the generated request handling.