Improve Kover setup by using only convention plugins (#6213)

* Improve Kover setup using convention plugins.
* Add a new JVM library convention plugin with Kover support

annotations/build.gradle.kts

@@ -6,6 +6,5 @@
  * Please see LICENSE files in the repository root for full details.
  */
 plugins {
-    alias(libs.plugins.kotlin.jvm)
-    id("com.android.lint")
+    id("io.element.jvm-library")
 }