[GR-69696] Fix OptimizedLocalizationMode wrt CalendarProvider

[graalvmbot]

Fixes:

com.oracle.svm.core.jdk.UnsupportedFeatureError: LocaleProviderAdapter.getAdapter:  providerClass: sun.util.spi.CalendarProvider, locale: en_US
	at com.oracle.svm.core.util.VMError.unsupportedFeature(VMError.java:121)
	at java.base@26/sun.util.locale.provider.LocaleProviderAdapter.getAdapter(LocaleProviderAdapter.java:55)
	at java.base@26/java.util.Calendar.createCalendar(Calendar.java:1692)
	at java.base@26/java.util.Calendar.getInstance(Calendar.java:1659)
	at java.base@26/java.text.SimpleDateFormat.initializeCalendar(SimpleDateFormat.java:683)
	at java.base@26/java.text.SimpleDateFormat.<init>(SimpleDateFormat.java:627)
	at java.base@26/java.text.SimpleDateFormat.<init>(SimpleDateFormat.java:606)

This is caused by the changes in #12160.