Impose standard indentation in nuopc_cap code

  Corrected unbalanced indentation levels and impose MOM6-standard 2-point
indentation in the config_src/driver/nuopc_cap code.  There were over 1000 lines
that used non-standard or unbalanced indentation, so when reviewing this commit
the use of the "ignore whitespace" option might be very useful.  All answers are
bitwise identical, and only white space changes are included.