[GR-55529] Mark option EmulateJython as stable

Author: timfel

CHANGELOG.md

@@ -11,6 +11,7 @@ language runtime. The main focus is on user-observable behavior of the engine.
 * We now provide intrinsified `_pickle` module also in the community version.
 * `polyglot.eval` now raises more meaningful exceptions. Unavaliable languages raise `ValueError`. Exceptions from the polyglot language are raised directly as interop objects (typed as `polyglot.ForeignException`). The shortcut for executing python files without specifying language has been removed, use regular `eval` for executing Python code.
 * In Jython emulation mode we now magically fall back to calling Java getters or setters when using Python attribute access for non-visible properties. This can help migrating away from Jython if you relied on this behavior. 
+* The option `python.EmulateJython` to enable Jython emulation is now marked as stable, and can thus be relied upon in production.
 
 ## Version 24.0.0
 * We now provide a collection of recipes in the form of GitHub Actions to build popular native extensions on GraalPy. These provide a reproducible way for the community to build native extensions for GraalPy with the correct dependencies. See scripts/wheelbuilder/README.md for details.

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/runtime/PythonOptions.java

@@ -346,7 +346,7 @@ private PythonOptions() {
     @Option(category = OptionCategory.EXPERT, help = "Whether C extension modules should be loaded as native code (as opposed to Sulong bitcode execution).") //
     public static final OptionKey<Boolean> NativeModules = new OptionKey<>(true);
 
-    @EngineOption @Option(category = OptionCategory.USER, usageSyntax = "true|false", help = "Emulate some Jython features that can cause performance degradation") //
+    @EngineOption @Option(category = OptionCategory.USER, usageSyntax = "true|false", help = "Emulate some Jython features that can cause performance degradation", stability = OptionStability.STABLE) //
     public static final OptionKey<Boolean> EmulateJython = new OptionKey<>(false);
 
     @Option(category = OptionCategory.EXPERT, usageSyntax = "true|false", help = "Enable tracing of native memory (ATTENTION: this will have significant impact on CExt execution performance).") //