fix importing geojson files on firefox on linux/openbsd

[landryb]

Description

using the profiletool from #9241, on master in firefox 122 it fails to recognize a valid geojson file (attached)

after looking in the developer console, file.type is application/geo+json in https://github.com/geosolutions-it/MapStore2/blob/master/web/client/plugins/longitudinalProfile/enhancers/processFile.js#L38 which isnt included in the list of supported mimetypes (eg only application/json)

looking into it, importing geojson files is globally broken because of a similar mimetype check in https://github.com/geosolutions-it/MapStore2/blob/master/web/client/components/import/dragZone/enhancers/processFiles.jsx#L50

How to reproduce

try to import
test2154.json (rename to test2154.geojson)

in a mapstore instance with EPSG:2154 defined
Expected Result
a profile should be computed from it (if the coverage is on the json area)

Current Result
profiletool says File not supported

with a mimetype fix, importing the file as a vector file goes further but fails with
You provided 'null' where a stream was expected. You can provide an Observable, Promise, Array, or Iterable.
but that should be another problem

• Not browser related

Browser info

(use this site: https://www.whatsmybrowser.org/ for non expert users)

Browser Affected	Version
Firefox on linux	122

Other useful information

Simple PR coming

[landryb]

fwiw, importing the same file converted as zipped-shape works.