Fix two small typos in gt4py branch

[gvollenweider]

Changes qsfg variable back to qs as in original fortran code.
Changes filename in @ported_function from cloudsc2.f90 back to cloudsc.f90.

[stubbiali]

Thanks a lot for spotting these typos @gvollenweider! Please merge.

[gvollenweider]

I don't think I have the rights to merge. 🤷🏽‍♂️
It seems like you need to merge?

[stubbiali]

You're right, I had to add you as a collaborator. Now you should be able to merge yourself.

[gvollenweider]

Thanks for adding me as a collaborator!
Before merging I ran the checks, and there are two issues:

1. The --with-loki runs fail during configuration with:

CMake Error at ecbuild/cmake/ecbuild_log.cmake:190 (message):
  CRITICAL - loki_transform_transpile() was removed!

  Please use

      loki_transform( COMMAND convert [...] )

  or

      loki_transform_target( COMMAND convert [...] ).

  
Call Stack (most recent call first):
  loki/cmake/loki_transform.cmake:455 (ecbuild_critical)
  cloudsc-dwarf/src/cloudsc_loki/CMakeLists.txt:662 (loki_transform_transpile)

2. The --single-precision runs fail during the build stage with

[Loki::Scheduler] Applied transformation <DrHookTransformation> in 0.00s
[Loki::Scheduler] Applied transformation <SanitiseTransformation> in 0.00s
Traceback (most recent call last):
  File "../../../loki/loki_env/bin/loki-transform.py", line 11, in <module>
    sys.exit(cli())
  File "/home/runner/work/dwarf-p-cloudsc/dwarf-p-cloudsc/build/loki/loki_env/lib/python3.8/site-packages/click/core.py", line 1157, in __call__
    return self.main(*args, **kwargs)
  File "/home/runner/work/dwarf-p-cloudsc/dwarf-p-cloudsc/build/loki/loki_env/lib/python3.8/site-packages/click/core.py", line 1078, in main
    rv = self.invoke(ctx)
  File "/home/runner/work/dwarf-p-cloudsc/dwarf-p-cloudsc/build/loki/loki_env/lib/python3.8/site-packages/click/core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/runner/work/dwarf-p-cloudsc/dwarf-p-cloudsc/build/loki/loki_env/lib/python3.8/site-packages/click/core.py", line 1434, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/runner/work/dwarf-p-cloudsc/dwarf-p-cloudsc/build/loki/loki_env/lib/python3.8/site-packages/click/core.py", line 783, in invoke
    return __callback(*args, **kwargs)
  File "/home/runner/work/dwarf-p-cloudsc/dwarf-p-cloudsc/build/loki/loki_env/lib/python3.8/site-packages/scripts/loki_transform.py", line 206, in convert
    eliminate_dead_code=eliminate_dead_code, allowed_aliases=horizontal.index
AttributeError: 'NoneType' object has no attribute 'index'

Should we merge anyway, and solve these later? Or should I try to solve them now, and only merge when all checks are green?