Migrate to io.spring.nullability Gradle plugin

There is an `io.spring.nullability` Gradle plugin for NullAway checks.
It includes `net.ltgt.errorprone` plugin transitively,
manages required dependencies,
covers respective configuration options

build.gradle

@@ -20,7 +20,7 @@ plugins {
 	id 'org.antora' version '1.0.0'
 	id 'io.spring.antora.generate-antora-yml' version '0.0.1'
 	id 'io.freefair.aggregate-javadoc' version '8.11'
-	id 'net.ltgt.errorprone' version '4.1.0' apply false
+	id 'io.spring.nullability' version '0.0.1' apply false
 }
 
 description = 'Spring AMQP'
@@ -157,7 +157,7 @@ configure(javaProjects) { subproject ->
 	apply plugin: 'checkstyle'
 	apply plugin: 'kotlin'
 	apply plugin: 'kotlin-spring'
-	apply plugin: 'net.ltgt.errorprone'
+	apply plugin: 'io.spring.nullability'
 
 	apply from: "${rootProject.projectDir}/gradle/publish-maven.gradle"
 
@@ -175,15 +175,6 @@ configure(javaProjects) { subproject ->
 	tasks.withType(JavaCompile) {
 		sourceCompatibility = JavaVersion.VERSION_17
 		options.encoding = 'UTF-8'
-		options.errorprone {
-			disableAllChecks = true
-			if (!name.toLowerCase().contains('test')) {
-				option('NullAway:OnlyNullMarked', 'true')
-				option('NullAway:CustomContractAnnotations', 'org.springframework.lang.Contract')
-				option('NullAway:JSpecifyMode', 'true')
-				error('NullAway')
-			}
-		}
 	}
 
 	compileTestKotlin {
@@ -223,9 +214,6 @@ configure(javaProjects) { subproject ->
 
 		testImplementation 'org.jetbrains.kotlin:kotlin-reflect'
 		testImplementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8'
-
-		errorprone 'com.uber.nullaway:nullaway:0.12.7'
-		errorprone 'com.google.errorprone:error_prone_core:2.36.0'
 	}
 
 	// enable all compiler warnings; individual projects may customize further