python: support id.emoji in output formats

Problem: The Python job formatting class does not support id.emoji,
even though emoji is valid jobid encoding.

Add `id.emoji` to various dictionaries as required to support this
encoding in output formats.

Author: grondo

src/bindings/python/flux/job/info.py

@@ -605,6 +605,7 @@ def job_fields_to_attrs(fields):
         "id.dec": (),
         "id.hex": (),
         "id.f58": (),
+        "id.emoji": (),
         "id.kvs": (),
         "id.words": (),
         "id.dothex": (),
@@ -697,6 +698,7 @@ class JobInfoFormat(flux.util.OutputFormat):
         "id.dec": "JOBID",
         "id.hex": "JOBID",
         "id.f58": "JOBID",
+        "id.emoji": "JOBID",
         "id.kvs": "JOBID",
         "id.words": "JOBID",
         "id.dothex": "JOBID",