job_specs: reduce number of ip4scale2m and driver combinations tested weekly

job_specs: reduce number of ip4scale2m and driver combinations tested weekly

Align with daily MRR executions and remove ip4scale2m weekly ndrpdr
executions for following:
- 2n-clx: x710-avf, xxv710-af_xdp, cx556a-rdma-core
- 2n-skx: x710-avf, xxv710-af_xdp
- 3n-skx: x710-avf
- 2n-tx2: xl710-af_xdp
- 2n-zn2: x710-avf, xxv710-af_xdp, cx556a-rdma-core

Change-Id: Idc863f763751cff58e715da411c4ce215d89e4b5
Signed-off-by: Maciek Konstantynowicz <mkonstan@cisco.com>
(cherry picked from commit eecc22d8782a562594d776e962a2fa952635bb5a)