Switch to 'runtimeClasspath' instead of resolve 'implementation' configuration

In PR logstash-plugins#69 the build.gradle was updated to run on Gradle 7, part of the change consisted in
forcing the resolution of 'implementation' configuration to use it in the listing of dependencies.
This could be assolved by the 'runtimeClasspath' without forcing the resolution which smells like a trick.

Relates logstash-plugins#69

Author: andsel

build.gradle

@@ -28,25 +28,23 @@ dependencies {
 
 
 task generateGemJarRequiresFile {
-    configurations.implementation.canBeResolved = true
     doLast {
         File jars_file = file('lib/logstash-input-azure_event_hubs.rb')
         jars_file.newWriter().withWriter { w ->
             w << "# AUTOGENERATED BY THE GRADLE SCRIPT. DO NOT EDIT.\n\n"
             w << "require \'jar_dependencies\'\n"
-            configurations.implementation.allDependencies.each {
+            configurations.runtimeClasspath.allDependencies.each {
                 w << "require_jar(\'${it.group}\', \'${it.name}\', \'${it.version}\')\n"
             }
         }
     }
 }
 
 task vendor {
-    configurations.implementation.canBeResolved = true
     doLast {
         String vendorPathPrefix = "vendor/jar-dependencies"
-        configurations.implementation.allDependencies.each { dep ->
-            File f = configurations.implementation.filter { it.absolutePath.contains("${dep.group}" + File.separator + "${dep.name}" + File.separator + "${dep.version}") }.singleFile
+        configurations.runtimeClasspath.allDependencies.each { dep ->
+            File f = configurations.runtimeClasspath.filter { it.absolutePath.contains("${dep.group}" + File.separator + "${dep.name}" + File.separator + "${dep.version}") }.singleFile
             String groupPath = dep.group.replaceAll('\\.', '/')
             File newJarFile = file("${vendorPathPrefix}" + File.separator + "${groupPath}" + File.separator + "${dep.name}"+ File.separator + "${dep.version}" + File.separator + "${dep.name}-${dep.version}.jar")
             newJarFile.mkdirs()