fix form data binary for jvm-ktor

Author: kalinjul

modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm-ktor/api.mustache

@@ -63,7 +63,7 @@ import com.fasterxml.jackson.databind.ObjectMapper
                         formData {
                     {{#formParams}}
                         {{#isFile}}
-                        {{{paramName}}}?.apply { append("{{{baseName}}}", {{{paramName}}}) }
+                        {{{paramName}}}?.apply { append({{{paramName}}}) }
                         {{/isFile}}
                         {{^isFile}}
                         {{^isArray}}
@@ -81,7 +81,7 @@ import com.fasterxml.jackson.databind.ObjectMapper
                         {{/isArray}}
                         {{#isArray}}
                         for (x in {{paramName}} ?: listOf()) {
-                            append("{{{baseName}}}", x.toString())
+                            {{#isFile}}append(it){{/isFile}}{{^isFile}}append("{{{baseName}}}", x.toString()){{/isFile}}
                         }
                         {{/isArray}}
                         {{/isFile}}

samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/apis/PetApi.kt

@@ -297,7 +297,7 @@ import java.text.DateFormat
             val localVariableBody = 
                         formData {
                         additionalMetadata?.apply { append("additionalMetadata", additionalMetadata) }
-                        file?.apply { append("file", file) }
+                        file?.apply { append(file) }
                         }
 
             val localVariableQuery = mutableMapOf<String, List<String>>()

samples/client/petstore/kotlin-jvm-ktor-jackson/src/main/kotlin/org/openapitools/client/apis/PetApi.kt

@@ -295,7 +295,7 @@ import com.fasterxml.jackson.databind.ObjectMapper
             val localVariableBody = 
                         formData {
                         additionalMetadata?.apply { append("additionalMetadata", additionalMetadata) }
-                        file?.apply { append("file", file) }
+                        file?.apply { append(file) }
                         }
 
             val localVariableQuery = mutableMapOf<String, List<String>>()

samples/client/petstore/kotlin-jvm-ktor-kotlinx_serialization/src/main/kotlin/org/openapitools/client/apis/PetApi.kt

@@ -294,7 +294,7 @@ import io.ktor.http.ParametersBuilder
             val localVariableBody = 
                         formData {
                         additionalMetadata?.apply { append("additionalMetadata", additionalMetadata) }
-                        file?.apply { append("file", file) }
+                        file?.apply { append(file) }
                         }
 
             val localVariableQuery = mutableMapOf<String, List<String>>()