[Build] Fix configuration cache issues with install task

* `install` task provided by `maven` plugin doesn't support configuration cache so replace `maven` plugin with `maven-publish` and use task that is subtype of PublishToMavenRepository. `maven-publish` partially support configuration cache, see https://github.com/gradle/gradle/issues/13468
* Apply `signing` plugin only if it really needed. The plugin doesn't support configuration cache. See https://github.com/gradle/gradle/issues/13470
Relates to #KT-44611

libraries/examples/annotation-processor-example/build.gradle.kts

@@ -1,10 +1,11 @@
 import org.jetbrains.kotlin.pill.PillExtension
+import plugins.configureKotlinPomAttributes
 
 description = "Simple Annotation Processor for testing kapt"
 
 plugins {
     kotlin("jvm")
-    maven // only used for installing to mavenLocal()
+    `maven-publish` // only used for installing to mavenLocal()
     id("jps-compatible")
 }
 
@@ -13,9 +14,24 @@ pill {
 }
 
 dependencies {
-    compile(kotlinStdlib())
+    implementation(kotlinStdlib())
 }
 
 sourceSets {
     "test" {}
+}
+
+publishing {
+    publications {
+        create<MavenPublication>("main") {
+            from(components["java"])
+        }
+    }
+    repositories {
+        mavenLocal() // to workaround configuration cache issues with 'publishToMavenLocal' task
+    }
+}
+
+tasks.register("install") {
+    dependsOn(tasks.named("publishAllPublicationsToMavenLocalRepository"))
 }