fix(toolkit): fix plugin descriptor not formed correctly (aws#5985)

Author: manodnyab

buildSrc/src/main/kotlin/temp-toolkit-intellij-root-conventions.gradle.kts

@@ -75,6 +75,7 @@ dependencies {
 //        create(type, version, useInstaller = false)
 //    }
 
+    implementation(project(":plugin-toolkit:jetbrains-core"))
     implementation(project(":plugin-toolkit:jetbrains-ultimate"))
     project.findProject(":plugin-toolkit:jetbrains-gateway")?.let {
         // does this need to be the instrumented variant?

plugins/toolkit/intellij-standalone/build.gradle.kts

@@ -21,9 +21,6 @@ intellijPlatform {
 dependencies {
     intellijPlatform {
         localPlugin(project(":plugin-core"))
-        pluginModule(project(":plugin-toolkit:jetbrains-core"))
-
-        plugin("PythonCore:243.18137.10")
     }
 }