Threedi-modelchecker

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- Reduced level of bank level check to warning.

- Reduced level of v2_connection_nodes.the_geom_linestring to info.

- Minor typographic fixes.

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- Convert v2_global settings enum values before using them in openapi models.

- Added checks for channel and culvert geometry distance to connection nodes.

- Added checks for illegal combinations of use_2d_flow, use_1d_flow, manhole_storage_area
and dem file presence.

- Changed cross section location geometry check to WARNING.

- This release requires at least geoalchemy2 0.9.0.

- Changed some nullability and geometry validity checks to WARNING.

- Removed check 0101 (bank level not NULL check).

- Only warn on dist_calc_points <= 0 and MANNING friction_value >= 1.

- Make the cross_section_location.bank_level >= reference_level check a WARNING. It will
be corrected anyway in make_tables.

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- Temporary patch: do not error if initial groundwaterlevel file is not present.

- Bugfix: Structure controls upload in simulation template generation.

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- Bugfix: Correct parsing of discharge_coefficients in table control.

- Removed timed control parsing, there are no models using it.

- Set maximum_time_step to sim_time_step if maximum_time_step is NULL or
less than sim_time_step. Reverts change in 0.19.

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- Set maximum_time_step to NULL where timestep_plus is not used.

- Replaced the generic timeseries check to more specific ones. The timeseries are
not required anymore to be of the same length. Added checks are: timesteps should be
>= 0 and increasing.

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- Make cross section definition checks more informative.

- Display the table name instead of the internal model name in the error
description.

- Accept schematisations with version 173 by re-implementing the last migration from
the old stack.

- Updated settings checks to match the current API.