[Kotlin] Update formParams.mustache to have List of MultipartBody.Part (OpenAPITools#19287)

* [Kotlin] Update formParams.mustache to have List of MultipartBody.Part * Update formParams.mustache * chore: removes new line

Author: ivanvasheka-intellias

modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm-retrofit2/formParams.mustache

@@ -1 +1 @@
-{{#isFormParam}}{{^isFile}}{{#isMultipart}}@Part{{/isMultipart}}{{^isMultipart}}@Field{{/isMultipart}}("{{baseName}}") {{{paramName}}}: {{{dataType}}}{{#required}}{{#defaultValue}} = {{^isNumber}}{{{defaultValue}}}{{/isNumber}}{{#isNumber}}{{{dataType}}}("{{{defaultValue}}}"){{/isNumber}}{{/defaultValue}}{{/required}}{{^required}}?{{#defaultValue}} = {{^isNumber}}{{{defaultValue}}}{{/isNumber}}{{#isNumber}}{{{dataType}}}("{{{defaultValue}}}"){{/isNumber}}{{/defaultValue}}{{^defaultValue}} = null{{/defaultValue}}{{/required}}{{/isFile}}{{#isFile}}{{#isMultipart}}@Part{{/isMultipart}}{{^isMultipart}}@Field("{{baseName}}"){{/isMultipart}} {{{paramName}}}: MultipartBody.Part{{^required}}? = null{{/required}}{{/isFile}}{{/isFormParam}}
+{{#isFormParam}}{{^isFile}}{{#isMultipart}}@Part{{/isMultipart}}{{^isMultipart}}@Field{{/isMultipart}}("{{baseName}}") {{{paramName}}}: {{{dataType}}}{{#required}}{{#defaultValue}} = {{^isNumber}}{{{defaultValue}}}{{/isNumber}}{{#isNumber}}{{{dataType}}}("{{{defaultValue}}}"){{/isNumber}}{{/defaultValue}}{{/required}}{{^required}}?{{#defaultValue}} = {{^isNumber}}{{{defaultValue}}}{{/isNumber}}{{#isNumber}}{{{dataType}}}("{{{defaultValue}}}"){{/isNumber}}{{/defaultValue}}{{^defaultValue}} = null{{/defaultValue}}{{/required}}{{/isFile}}{{#isFile}}{{#isMultipart}}@Part{{/isMultipart}}{{^isMultipart}}@Field("{{baseName}}"){{/isMultipart}} {{{paramName}}}: {{#isCollectionFormatMulti}}List<{{/isCollectionFormatMulti}}MultipartBody.Part{{#isCollectionFormatMulti}}>{{/isCollectionFormatMulti}}{{^required}}? = null{{/required}}{{/isFile}}{{/isFormParam}}