Temporarily downgrade Java compat level for AspectJ classes

AspectJ doesn't support JDK17 language level (yet).
For the time being, this commit is downgrading the language level for
the aspectJ generated classes to 1.8.

See gh-27416

build.gradle

@@ -6,7 +6,7 @@ plugins {
 	id 'org.asciidoctor.jvm.convert' version '3.3.2'
 	id 'org.asciidoctor.jvm.pdf' version '3.3.2'
 	id 'de.undercouch.download' version '4.1.2'
-	id "io.freefair.aspectj" version '6.1.0' apply false
+	id "io.freefair.aspectj" version '6.2.0' apply false
 	id "com.github.ben-manes.versions" version '0.39.0'
 	id "com.github.johnrengelman.shadow" version '7.0.0' apply false
 	id "me.champeau.jmh" version "0.6.6" apply false

spring-aspects/spring-aspects.gradle

@@ -10,6 +10,15 @@ sourceSets.test.java.srcDirs = files()
 
 aspectj.version = dependencyManagement.managedVersions['org.aspectj:aspectjweaver']
 
+compileAspectj {
+	sourceCompatibility "1.8"
+	targetCompatibility "1.8"
+}
+compileTestAspectj {
+	sourceCompatibility "1.8"
+	targetCompatibility "1.8"
+}
+
 dependencies {
 	api("org.aspectj:aspectjweaver")
 	compileOnly("org.aspectj:aspectjrt")