Use separate directories for modules of each target to circumvent
[Issue 22898](https://gitlab.kitware.com/cmake/cmake/-/issues/22898)
of CMake.

Provide list of input files as arguments of `inst_eddies.py`,
following commit 8e0c03e1.

For programs `inst_eddies` and `test_get_1_outerm`, following commits
9a59d13 and 9dc139d.

Following updates of the libraries.

Following commit b0e3ce55.

As for the program `inst_eddies`.

Following updates of the libraries.

Rename component `list_vis` of derived type snapshot to list. Since
there are no longer invisible (interpolated) eddies.

In commit d5e89eb9, the test was added with the useless key
"input". Now, after commit 29c37646, the useless key is the key "required".

Now that `inst_eddies` reads `main_nml` only on the first date, we do
not need to create a file `main_nml.txt` before running
`inst_eddies.py`. `inst_eddies.py` can just read `main_nml` from
standard input.

If we are appending to an existing SHPC then read `main_nml` from file
`used_nml.txt` instead of from standard input, and do not re-create
file `used_nml.txt`. It would be a mess to have an SHPC made with
different run parameters for different parts of the shapefiles.

Thanks to commit 5ff9e1d2, we are reverting in part commit f04aea8b.

Rename component `number_vis_extr` of derived type snapshot to
`number_extr`. Since there is no longer another compoment including
interpolated eddies.

Replace `SHPC_(anti|cyclo)_all_dates` by `SHPC_(anti|cyclo)`.

Because now there is a case when we want to open in appending mode: in
program `inst_eddies`.

Note that programs `test_max_speed_contour_ssh` and `test_weight`
depend on fortranGIS through the module derived_types. Compilation
worked without linking to fortranGIS because objects used by
`test_max_speed_contour_ssh` and `test_weight` in
derived types do not use fortranGIS.

Thanks to commit 5ff9e1d2, we are reverting in part commit 83123e30.

Because we are going to add preprocessor directives.

I added assert in commit 83123e30, I do not know why, it was not used.

`test_nearby_extr` does not need NetCDF since commit 83123e30.

In case we are a sub-project.

Thus remove too component interpolated of derived type eddy and
component `extr_interp` of derived type shpc.

Follow-up to commit 3b68dd5.

Replace positional argument template by optional argument. This
argument is now needed only in case we process several dates, since
the first date is now read from the NetCDF file.

To ease use of call with keywords.

Even for a run with a single MPI process, otherwise execution will not
work on some systems (jean-zay).

Replace `/proju/lmd-oce/data/AVISO/DT_2018/2006/01` by
`$large_input_dir`.

This SHPC was made with an old version of `inst_eddies`: it contained
cyclones and anticyclones output together. We create a test `Region_6`
instead.

Since `Inst_eddies_loop` is in the same series of tests as
`Nearby_extr`, take it from `$PWD` rather than `$tests_old_dir`.

We now impose that all eddies in an SHPC have the same
orientation. Remove field `extr_cycl` from the derived type shpc and
add field cyclone to shpc. When reading an eddy, give it the
orientation of its SHPC. Add argument cyclone to procedure
`shpc_create`. Create a file `orientation.txt` in each SHPC. When
writing an eddy, check that its orientation matches that of the SHPC.

Rename triplet to collection, `shp_tr` to shpc, shpt to shpc in
comments, identifiers and file names.