update read_bodc dimension to include id_dim

[jpolton]

Pull request checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)
  • Some docs updates need to be made in the COAsT-site repo, in a separate PR. See contributing to documentation for details.
• Build (./build.sh) was run locally and no errors reported. NB not sure about this requirement: GitActions test this
• Lint (pylint .) has passed locally and any fixes were made for failures. NB not sure about this requirement: GitActions test this with black

Pull request type

Update read_bodc method to include awareness of id_dim
Make these data loads consistent with data objects from read_gesla.

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Error when trying to use obs_operator() on data object generated with tidegauge.read_bodc()
Method is missing latitude and longitude coords. (There are in attributes)

Issue URL: #

What is the new behavior?

No error when trying to use obs_operator() on data object generated with tidegauge.read_bodc()
Lat and lon are now coordinates and not attributes.

Checklist

• Code compiles correctly
• Created tests which fail without the change (if possible)
• All tests passing (pip install . && pytest unit_testing/unit_test.py -s)
• Extended the README / documentation, if necessary
• Added myself / the copyright holder to the AUTHORS file

Does this introduce a breaking change?

• Yes
• No