DAOS-14572 pydaos: Add a pydaos.DaosErrorCode class to mapping errors.

[ashleypittman]

Add a top-level class to pydaos to represent error codes in daos and to map between numerical values, symbolic names and descriptions.

Signed-off-by: Ashley Pittman [email protected]

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[dnestoro]

@AndreyChukhlebov please sign the Oracle Contributor Agreement according to this comment in order to merge this PR