Use AbstractAotProcessor.AOT_PROCESSING instead of duplicate constant

Closes gh-42461

src/checkstyle/import-control.xml

@@ -77,6 +77,7 @@
 	<!-- Logging -->
 	<subpackage name="logging">
 		<allow pkg="org.springframework.boot.context.properties.bind" />
+		<allow pkg="org.springframework.context.aot" />
 		<disallow pkg="org.springframework.context" />
 		<disallow pkg="org.springframework.boot.context" />
 	</subpackage>