Deprecate RuntimeContext.get (ray-project#33734)

RuntimeContext.get exposes Cython ids instead of strings so we should deprecate it and in favor of get_xxx_id() methods.

Signed-off-by: Jiajun Yao <jeromeyjj@gmail.com>
Signed-off-by: elliottower <elliot@elliottower.com>

python/ray/runtime_context.py

@@ -17,6 +17,9 @@ def __init__(self, worker):
         assert worker is not None
         self.worker = worker
 
+    @Deprecated(
+        message="Use get_xxx_id() methods to get relevant ids instead", warning=True
+    )
     def get(self) -> Dict[str, Any]:
         """Get a dictionary of the current context.