incorrect data type for some bands of HRLVPP collections.

[VictorVerhaert]

originated from https://github.com/eu-cdse/openeo-cdse-infra/issues/272

Confirmed that metadata in stac is simply wrong for the moment:

NDVI:

Band 1 Block=512x512 Type=Int16, ColorInterp=Gray
  Description = Normalized Difference Vegetation Index calculated using the Sentinel2 Multi Spectral Imager data
  NoData Value=-32768
  Overviews: 2745x2745, 1373x1373, 687x687, 344x344
  Unit Type: -
  Offset: 0,   Scale:0.0001
  Metadata:
    Overviews method=average
    PhysRange=-0.08 to 1.0

QFlag2 is in uint16, not uint8:

Band 1 Block=512x512 Type=UInt16, ColorInterp=Gray
  Description = HRVPP VI Quality Flag
  NoData Value=65535
  Overviews: 2745x2745, 1373x1373, 687x687, 344x344
  Metadata:
    Overviews method=mode