fix filter timeseries in setup_x_forcing

[DirkEilander]

Issue addressed

Fixes filtering of timeseries in case you have a large dataset in separate files for the timeseries and locations (rather than one geodataset). If the locations are filtered based on the model region a subset of the locations and all timeseries are passed to the set_1d_forcing method raising an error that the indices do not match.

Explanation

Add a filtering step after reading the location in setup_waterlevel_forcing and setup_discharge_forcing

Checklist

• Updated tests or added new tests
• Branch is up to date with main
• Updated documentation if needed
• Updated changelog.rst if needed

Additional Notes (optional)

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