Stop initializing DataSize at build time for GraalVM

In light of gh-28560, this commit reverts the change made in gh-28328.

Closes gh-28562

Author: sbrannen

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

@@ -1,3 +1,2 @@
 Args = --initialize-at-build-time=org.springframework.aot.AotDetector \
---initialize-at-build-time=org.springframework.core.NativeDetector \
---initialize-at-build-time=org.springframework.util.unit.DataSize
+--initialize-at-build-time=org.springframework.core.NativeDetector