Fix one test and enable Kapt processing on 21

I cannot work out how to launch the kotlin daemon on the toolchain jdk

gradle.properties

@@ -57,3 +57,5 @@ org.gradle.parallel=true
 org.gradle.jvmargs=-Xmx1g
 systemProp.predictiveTestSelection=false
 predictiveTestSelection=false
+
+kotlin.daemon.jvmargs= --add-opens=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-opens=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED --add-opens=jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED --add-opens=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED --add-opens=jdk.compiler/com.sun.tools.javac.jvm=ALL-UNNAMED --add-opens=jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED --add-opens=jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED --add-opens=jdk.compiler/com.sun.tools.javac.processing=ALL-UNNAMED --add-opens=jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED --add-opens=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED

inject-java/src/test/groovy/io/micronaut/inject/requires/RequiresSpec.groovy

@@ -53,7 +53,7 @@ class MyBean {
         def lines = e.message.readLines().collect { it.trim() }
         lines[0] == 'No bean of type [test.MyBean] exists. The following matching beans are disabled by bean requirements:'
         lines[1] == '* Bean of type [test.MyBean] is disabled because:'
-        lines[2] == '- Java major version [17] must be at least 800'
+        lines[2] == "- Java major version [${Runtime.version().feature()}] must be at least 800"
 
         cleanup:
         context.close()