[GR-48259] AddAllCharsets is necessary for org.jcodings.Encoding#getCharset()

* Until we remove all usages of it.

Author: eregon

Diff for: mx.truffleruby/native-image.properties

@@ -1,8 +1,5 @@
 # This file contains native-image arguments needed to build truffleruby
-#
 
 Requires = language:nfi language:llvm language:regex
 
-Args = -H:+AddAllCharsets 
-
 JavaArgs = -Dpolyglot.image-build-time.PreinitializeContexts=ruby

Diff for: src/main/java/META-INF/native-image/org.graalvm.ruby/native-image.properties

@@ -1,4 +1,5 @@
 # This file contains native-image arguments needed to build truffleruby
-#
+
 Args = -H:MaxRuntimeCompileMethods=5400 \
+       -H:+AddAllCharsets \
        --initialize-at-build-time=org.truffleruby,org.jcodings,org.joni,org.yarp