Use Gradle nullability plugin 0.0.1

This commit replaces manual Gradle configuration of Error Prone
and NullAway by
https://github.com/spring-gradle-plugins/nullability-plugin.

Closes gh-34983

build.gradle

@@ -6,7 +6,7 @@ plugins {
 	id 'com.github.bjornvester.xjc' version '1.8.2' apply false
 	id 'io.github.goooler.shadow' version '8.1.8' apply false
 	id 'me.champeau.jmh' version '0.7.2' apply false
-	id "net.ltgt.errorprone" version "4.1.0" apply false
+	id "io.spring.nullability" version "0.0.1" apply false
 }
 
 ext {