[End- to End Test code sprint] Add SEVIRI METEOSAT-8 and METEOSAT-11 …

…to end-to-end testing (#766)

(#765)

End-to-end testing for Spinning Enhanced Visible and InfraRed Imager
(**SEVIRI**) from METEOSAT-8 and to METEOSAT-11

**New files include:**
- `parm/ioda/bufr2ioda//bufr2ioda_sevcsr.json` : JSON containing data
format, sensor/bufr2ioda_sevcsr.json, and satellite information
- `ush/ioda/bufr2ioda/bufr2ioda_sevcsr.py` : bufr2ioda python code for
converting SEVIRI METEOSAT-8 and METEOSAT-11 from BUFR to IODA
- `parm/atm/obs/config/seviri_m08.yaml.j2`
- `parm/atm/obs/config/seviri_m11.yaml.j2`
- `parm/atm/obs/lists/gdas_prototype_3d.yaml.j2`

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Co-authored-by: RussTreadon-NOAA <[email protected]>
Co-authored-by: Emily Liu <[email protected]>
Co-authored-by: Cory Martin <[email protected]>
Co-authored-by: emilyhcliu <[email protected]>
Co-authored-by: BrettHoover-NOAA <[email protected]>
Co-authored-by: Brett Hoover <[email protected]>
Co-authored-by: Xuanli Li <[email protected]>
Co-authored-by: Azadeh Gholoubi <[email protected]>
Co-authored-by: Azadeh Gholoubi <[email protected]>
Co-authored-by: RussTreadon-NOAA <[email protected]>
Co-authored-by: Azadeh Gholoubi <[email protected]>