[Bug][Kotlin-client] Can now handle path param of type list (#12244)

* Bugfix Kotlin-client: Can now handle path param of type list for jvm-volley and multiplatform. Also cleaning up generated code

* Adding samples to github workflow. Deleting old workflow

* Tweaking setup of jvm-volley

* Updating samples

Co-authored-by: William Cheng <wing328hk@gmail.com>

samples/client/petstore/kotlin-array-simple-string-jvm-volley/build.gradle

@@ -0,0 +1,87 @@
+
+buildscript {
+
+    ext.kotlin_version = '1.5.10'
+    ext.swagger_annotations_version = "1.6.2"
+    ext.gson_version = "2.8.6"
+    ext.volley_version = "1.2.0"
+    ext.junit_version = "4.13.2"
+    ext.robolectric_version = "4.5.1"
+    ext.concurrent_unit_version = "0.4.6"
+
+    repositories {
+        mavenLocal()
+        google()
+        maven {
+            url 'https://dl.google.com/dl/android/maven2'
+        }
+        mavenCentral()
+    }
+    dependencies {
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+        classpath 'com.android.tools.build:gradle:4.0.2'
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+
+android {
+    compileSdkVersion 30
+    defaultConfig {
+        minSdkVersion 21
+        targetSdkVersion 30
+    }
+    compileOptions {
+        coreLibraryDesugaringEnabled true
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    lintOptions {
+        abortOnError false
+    }
+
+    // Rename the aar correctly
+    libraryVariants.all { variant ->
+        variant.outputs.all { output ->
+            if (outputFile != null && outputFileName.endsWith('.aar')) {
+                outputFileName = "${archivesBaseName}-${version}.aar"
+            }
+        }
+    }
+
+    testOptions {
+        unitTests.returnDefaultValues = true
+    }
+}
+
+dependencies {
+    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.1.5'
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation "io.swagger:swagger-annotations:$swagger_annotations_version"
+    implementation "com.google.code.gson:gson:$gson_version"
+    implementation "com.android.volley:volley:${volley_version}"
+    testImplementation "junit:junit:$junit_version"
+    testImplementation "org.robolectric:robolectric:${robolectric_version}"
+    testImplementation "net.jodah:concurrentunit:${concurrent_unit_version}"
+}
+
+afterEvaluate {
+    android.libraryVariants.all { variant ->
+        def task = project.tasks.create "jar${variant.name.capitalize()}", Jar
+        task.description = "Create jar artifact for ${variant.name}"
+        task.dependsOn variant.javaCompile
+        task.from variant.javaCompile.destinationDir
+        task.destinationDirectory = project.file("${project.buildDir}/outputs/jar")
+        task.archiveFileName = "${project.name}-${variant.baseName}-${version}.jar"
+        artifacts.add('archives', task);
+    }
+}
+