Add new "one-to-one" mode for modelling tides at multiple locations with unique timesteps

[robbibt]

Proposed changes

Currently, the model_tides function operates in "one-to-many" mode, which will model tides for every requested timestep, at every requested location. For example, if we provided five x, y coordinates and five timesteps, the function would return:

5 locations * 5 timesteps = 25 modelled tides

However, often a user may want to model tides for a list of locations, each with a unique timesteps.

This change adds a new "one-to-one" mode, allowing users to model tides for only these exact pairs of locations and times. Using the previous example (five x, y coordinates and five timesteps) in "one-to-one" mode:

5 timesteps at 5 locations = 5 modelled tides

Example from notebook:

Other changes:

• Updated How_to_guides/Tidal_modelling.ipynb to document new functionality
• Added tests for new functionality

Closes issues (optional)

• Closes Issue Allow model_tides to work for one timestep per one point #1134

Checklist (replace [ ] with [x] to check off)

• Notebook created using the DEA-notebooks template
• Remove any unused Python packages from Load packages
• Remove any unused/empty code cells
• Remove any guidance cells (e.g. General advice)
• Ensure that all code cells follow the PEP8 standard for code. The jupyterlab_code_formatter tool can be used to format code cells to a consistent style: select each code cell, then click Edit and then one of the Apply X Formatter options (YAPF or Black are recommended).
• Include relevant tags in the final notebook cell (refer to the DEA Tags Index, and re-use tags if possible)
• Clear all outputs, run notebook from start to finish, and save the notebook in the state where all cells have been sequentially evaluated
• Test notebook on both the NCI and DEA Sandbox (flag if not working as part of PR and ask for help to solve if needed)
• If applicable, update the Notebook currently compatible with the NCI|DEA Sandbox environment only line below the notebook title to reflect the environments the notebook is compatible with

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[vnewey]

Nice work Robbi!