fix: update schema where necessary to make rg-db-group checks run without warnings

[sbillinge]

Problem

Warnings abound when rg-db-group checks are run:
e.g. (but there are many more)

/usr/share/miniconda/envs/test/lib/python3.11/site-packages/regolith/schemas.py:186: UserWarning: "backburner" is not in the preferred entries for "status", please consider changing this entry to conform or add this to the ``eallowed`` field in the schema.
  warn(
/usr/share/miniconda/envs/test/lib/python3.11/site-packages/regolith/schemas.py:186: UserWarning: "pr" is not in the preferred entries for "type", please consider changing this entry to conform or add this to the ``eallowed`` field in the schema.
  warn(
/usr/share/miniconda/envs/test/lib/python3.11/site-packages/regolith/schemas.py:186: UserWarning: "skeleton" is not in the preferred entries for "type", please consider changing this entry to conform or add this to the ``eallowed`` field in the schema.
  warn(
/usr/share/miniconda/envs/test/lib/python3.11/site-packages/regolith/schemas.py:186: UserWarning: "pending" is not in the preferred entries for "status", please consider changing this entry to conform or add this to the ``eallowed`` field in the schema.
  warn(
/usr/share/miniconda/envs/test/lib/python3.11/site-packages/regolith/schemas.py:186: UserWarning: "converge" is not in the preferred entries for "status", please consider changing this entry to conform or add this to the ``eallowed`` field in the schema.
  warn(
/usr/share/miniconda/envs/test/lib/python3.11/site-packages/regolith/schemas.py:186: UserWarning: "deliverable" is not in the preferred entries for "type", please consider changing this entry to conform or add this to the ``eallowed`` field in the schema.
  warn(
/usr/share/miniconda/envs/test/lib/python3.11/site-packages/regolith/schemas.py:186: UserWarning: "finish" is not in the preferred entries for "status", please consider changing this entry to conform or add this to the ``eallowed`` field in the schema.
  warn(
/usr/share/miniconda/envs/test/lib/python3.11/site-packages/regolith/schemas.py:186: UserWarning: "sent" is not in the preferred entries for "type", please consider changing this entry to conform or add this to the ``eallowed`` field in the schema.
  warn(
/usr/share/miniconda/envs/test/lib/python3.11/site-packages/regolith/schemas.py:186: UserWarning: "tbd" is not in the preferred entries for "type", please consider changing this entry to conform or add this to the ``eallowed`` field in the schema.
  warn(
/usr/share/miniconda/envs/test/lib/python3.11/site-packages/regolith/schemas.py:186: UserWarning: "beamtime" is not in the preferred entries for "type", please consider changing this entry to conform or add this to the ``eallowed`` field in the schema.
  warn(
/usr/share/miniconda/envs/test/lib/python3.11/site-packages/regolith/schemas.py:186: UserWarning: "Masters Researcher" is not in the preferred entries for "position", please consider changing this entry to conform or add this to the ``eallowed`` field in the schema.
  warn(
/usr/share/miniconda/envs/test/lib/python3.11/site-packages/regolith/schemas.py:186: UserWarning: "masters" is not in the preferred entries for "status", please consider changing this entry to conform or add this to the ``eallowed`` field in the schema.
  warn(

Proposed solution

we would like to get rid of these warnings. Some will require updating the databases in rg-db-group, but some are errors because we need to add desired vallues to eallowed fields in schemas.json here in regolith