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 {

gradle/spring-module.gradle

@@ -6,15 +6,13 @@ apply plugin: 'org.springframework.build.optional-dependencies'
 // apply plugin: 'io.github.goooler.shadow'
 apply plugin: 'me.champeau.jmh'
 apply from: "$rootDir/gradle/publications.gradle"
-apply plugin: 'net.ltgt.errorprone'
+apply plugin: "io.spring.nullability"
 
 dependencies {
 	jmh 'org.openjdk.jmh:jmh-core:1.37'
 	jmh 'org.openjdk.jmh:jmh-generator-annprocess:1.37'
 	jmh 'org.openjdk.jmh:jmh-generator-bytecode:1.37'
 	jmh 'net.sf.jopt-simple:jopt-simple'
-	errorprone 'com.uber.nullaway:nullaway:0.12.4'
-	errorprone 'com.google.errorprone:error_prone_core:2.36.0'
 }
 
 pluginManager.withPlugin("kotlin") {
@@ -126,15 +124,3 @@ publishing {
 components.java.withVariantsFromConfiguration(configurations.testFixturesApiElements) { skip() }
 components.java.withVariantsFromConfiguration(configurations.testFixturesRuntimeElements) { skip() }
 
-tasks.withType(JavaCompile).configureEach {
-	options.errorprone {
-		disableAllChecks = true
-		option("NullAway:OnlyNullMarked", "true")
-		option("NullAway:CustomContractAnnotations", "org.springframework.lang.Contract")
-		option("NullAway:JSpecifyMode", "true")
-	}
-}
-tasks.compileJava {
-	// The check defaults to a warning, bump it up to an error for the main sources
-	options.errorprone.error("NullAway")
-}