feat(tests): Remove PPS tests.

+ Delete nat44 pps suites.
+ Rename ip4base suites, testcases, suite tags (also tg) to -tput.
 + Also robot tags like UDP_PPS and TCP_PPS.
- Keep traffic types and traffic profile names with pps.
 + They can be renamed in a different change if needed.
+ Update job specs.
- Do not update methodology yet (avoid conflict with another Change).

Ticket: CSIT-1829

Change-Id: Ic0dac441f6e8253edce88e057ab7fad1d3814c24
Signed-off-by: Vratko Polak <vrpolak@cisco.com>