[REQ][typescript-axios] Disable factory when not needed

Is your feature request related to a problem? Please describe.

Code coverage on generated api client is failing because of unused factory functions.

Describe the solution you'd like

To have a parameter which switches factory functions through mustache

Describe alternatives you've considered

Modifying the generated api.ts file post generation. Currently using a local templates but seems like a feature others can use.

Additional context

The default should be true to avoid any backwards compatibility issues
modules/openapi-generator/src/main/resources/typescript-axios/apiInner.mustache

{{withFactory}}
/**
 * {{classname}} - factory interface{{#description}}
 * {{&description}}{{/description}}
 * @export
 */
export const {{classname}}Factory = function (configuration?: Configuration, basePath?: string, axios?: AxiosInstance) {
    const localVarFp = {{classname}}Fp(configuration)
    return {
    {{#operation}}
        /**
         * {{&notes}}
         {{#summary}}
         * @summary {{&summary}}
         {{/summary}}
        {{#useSingleRequestParameter}}
         {{#allParams.0}}
         * @param {{=<% %>=}}{<%& classname %><%& operationIdCamelCase %>Request}<%={{ }}=%> requestParameters Request parameters.
         {{/allParams.0}}
        {{/useSingleRequestParameter}}
        {{^useSingleRequestParameter}}
         {{#allParams}}
         * @param {{=<% %>=}}{<%&dataType%>}<%={{ }}=%> {{^required}}[{{/required}}{{paramName}}{{^required}}]{{/required}} {{description}}
         {{/allParams}}
        {{/useSingleRequestParameter}}
         * @param {*} [options] Override http request option.{{#isDeprecated}}
         * @deprecated{{/isDeprecated}}
         * @throws {RequiredError}
         */
        {{#useSingleRequestParameter}}
        {{nickname}}({{#allParams.0}}requestParameters: {{classname}}{{operationIdCamelCase}}Request{{^hasRequiredParams}} = {}{{/hasRequiredParams}}, {{/allParams.0}}options?: AxiosRequestConfig): AxiosPromise<{{{returnType}}}{{^returnType}}void{{/returnType}}> {
            return localVarFp.{{nickname}}({{#allParams.0}}{{#allParams}}requestParameters.{{paramName}}, {{/allParams}}{{/allParams.0}}options).then((request) => request(axios, basePath));
        },
        {{/useSingleRequestParameter}}
        {{^useSingleRequestParameter}}
        {{nickname}}({{#allParams}}{{paramName}}{{^required}}?{{/required}}: {{{dataType}}}, {{/allParams}}options?: any): AxiosPromise<{{{returnType}}}{{^returnType}}void{{/returnType}}> {
            return localVarFp.{{nickname}}({{#allParams}}{{paramName}}, {{/allParams}}options).then((request) => request(axios, basePath));
        },
        {{/useSingleRequestParameter}}
    {{/operation}}
    };
};

{{/withFactory}}

Start with modules/openapi-generator/src/main/resources/typescript-axios/apiInner.mustache and inspect how existing Mustache parameters control generated sections. Add the requested parameter around the factory output, with a default of true for compatibility. Done means the factory can be disabled during generation without removing other generated client code.