Add filter to return exported results

[mmacata]

This PR

• leaves output of GRASS GIS module description as is (just to clarify)
• moves previous returns items from actinia module to parameters (as it really is a template placeholder value which needs to be filled, even though in the end an output is created)
• default endpoint behaviour without HTTP GET parameter is to return empty returns array for actinia modules
• adds HTTP GET parameter returns to both /modules and /actinia_modules endpoints
• when returns=export is specified, it looks up export statements in the process chain template and adds them to the results array
• it is possible that returns=persistent will be added in the future to add all parameters which have the 'gisprompt.age' == 'new', value from GRASS GIS. This won't work out-of-the-box because only the GRASS GIS modules which have a placeholder in the template are requested for self-description yet.

Example of new self description for default actinia module slope_aspect

{
  "categories": [
    "actinia-module",
    "global-template"
  ],
  "description": "Calculates slope and aspect of elevation map.",
  "id": "slope_aspect",
  "parameters": [
    {
      "default": "FCELL",
      "description": "Type of output aspect and slope maps. Storage type for resultant raster map.  [generated from r.slope.aspect_precision]",
      "name": "datatype",
      "optional": true,
      "schema": {
        "enum": [
          "CELL",
          "FCELL",
          "DCELL"
        ],
        "type": "string"
      }
    },
    {
      "description": "Name for output slope raster map.  [generated from r.slope.aspect_slope]",
      "name": "name_of_output_slope",
      "optional": true,
      "schema": {
        "subtype": "cell",
        "type": "string"
      }
    },
    {
      "description": "Name for output aspect raster map.  [generated from r.slope.aspect_aspect]",
      "name": "name_of_output_aspect",
      "optional": true,
      "schema": {
        "subtype": "cell",
        "type": "string"
      }
    }
  ],
  "projects": [],
  "returns": [
    {
      "description": [
        "Exported result from exporter r.slope.aspect aspect parameter"
      ],
      "name": "{{ name_of_output_aspect }}",
      "schema": {
        "subtype": "GTiff",
        "type": "raster"
      }
    },
    {
      "description": [
        "Exported result from exporter exporter raster parameter"
      ],
      "name": "{{ name_of_output_slope }}",
      "schema": {
        "subtype": "GTiff",
        "type": "raster"
      }
    }
  ]
}

Example of new self description for default actinia module point_in_polygon

{
  "categories": [
    "actinia-module",
    "global-template"
  ],
  "description": "Imports point and polygon and checks if point is in polygon.",
  "id": "point_in_polygon",
  "parameters": [
    {
      "description": "The input source that may be a landsat scene name, a sentinel2 scene name, a postGIS database string, or an URL that points to an accessible raster or vector file [generated from import_descr_source]",
      "name": "url_to_geojson_point",
      "optional": true,
      "schema": {
        "type": "string"
      }
    }
  ],
  "projects": [
    "nc_spm_08"
  ],
  "returns": [
    {
      "description": [
        "Exported result from exporter exporter map parameter"
      ],
      "name": "point",
      "schema": {
        "subtype": "GeoJSON",
        "type": "vector"
      }
    }
  ]
}

[linakrisztian]

Nice thanks:)

[mmacata]

Tests for GRASS GIS 8.3 fail because base image is not updated (e.g with actinia-org/actinia-docker#130). @anikaweinmann what do you think - should we still support G83 in the tests?

[neteler]

FYI: the latest GRASS GIS 8.3.2 release is from 07 Mar 2024 (https://grass.osgeo.org/about/history/releases/), almost 2 years ago...