Add missing build time class initialization

As gh-28624 supports only static boolean fields, we still
need a few classes to be initialized at build time.

Such explicit configuration should be in theory avoidable,
so we will work with the GraalVM team to see if this can be
fixed, see for example
https://github.com/oracle/graal/issues/4673
for HttpStatus.

See gh-28624

spring-core/graalvm/src/main/resources/META-INF/native-image/org.springframework/spring-core/native-image.properties

@@ -1 +0,0 @@
-Args = --initialize-at-build-time=org.springframework.aot.graalvm.ThrowawayClassLoader

spring-core/src/main/resources/META-INF/native-image/org.springframework/spring-core/native-image.properties

@@ -0,0 +1,5 @@
+Args = --initialize-at-build-time=org.springframework.aot.graalvm.ThrowawayClassLoader,\
+org.springframework.util.ClassUtils,\
+org.springframework.util.ConcurrentReferenceHashMap,\
+org.springframework.util.MimeType,\
+org.springframework.util.MimeTypeUtils

spring-web/src/main/resources/META-INF/native-image/org.springframework/spring-web/native-image.properties

@@ -0,0 +1,2 @@
+Args = --initialize-at-build-time=org.springframework.http.HttpStatus,\
+org.springframework.http.MediaType