Flip --incompatible_objc_linking_info_migration to true

See #16939.

This flips the default behavior so that builtin Objective C rules will get their
linking info from CcInfo instead of ObjcProvider.  We will start cleaning up
apple/swift starlark rules to stop generating linking info in ObjcProvider, so
it makes sense to flip the default for this flag before those changes land in
open source.

RELNOTES[inc]: builtin objc rules will get their linking info from CcInfo, not ObjcProvider

PiperOrigin-RevId: 504621116
Change-Id: I78ab2d3aca85dc0c7ef754dc8240ffa6a8f66ab9

src/main/java/com/google/devtools/build/lib/rules/objc/ObjcCommandLineOptions.java

@@ -171,7 +171,7 @@ public class ObjcCommandLineOptions extends FragmentOptions {
 
   @Option(
       name = "incompatible_objc_linking_info_migration",
-      defaultValue = "false",
+      defaultValue = "true",
       documentationCategory = OptionDocumentationCategory.TOOLCHAIN,
       effectTags = {OptionEffectTag.LOADING_AND_ANALYSIS, OptionEffectTag.CHANGES_INPUTS},
       metadataTags = {OptionMetadataTag.INCOMPATIBLE_CHANGE},