properly pass along negate_match arg in file.sed state

Fixes pylint warning:
```
salt/states/file.py:1582: [W0613(unused-argument), sed] Unused argument 'negate_match'
```
Fixup for 487203d60e90edaf784ed7b4219186fd728a5b44.
Also, switches to using keyword arguments due to large number of arguments involved.