[com1;com8;com9;in1;in2;in3] Read from raster

[awirb]

Allow reading input data from raster without any additional shapefile

• release, secondaryRelease, entrainment, resistance and friction parameters
• for thickness files (release, secondaryRelease, entrainment) - values are directly taken from raster file - where values != 0 thickness is set according to raster values
• resistance - if values != 0 resistance area if values ==0 no resistance (parameters for resistance are taken from ini file)
• if file provided as .asc or .tif - reading thickness from ini file does NOT work and thickness variation through ini file not possible

Todos see: #1201

Notes:
When using raster files:

• relThFromFile is set to "True" (since thickness is read from the file)
• But the attributes relThId, relThThickness, and relThCi95 don't exist (because
  getThicknessValue returns early for raster files)
• The old code tried to access these non-existent attributes, causing the KeyError
• The new code detects raster files first and skips the shapefile-specific attribute handling

Maybe fixes #1110