feat(bonding): Add simple suite for minimal coverage

feat(bonding): Add simple suite for minimal coverage

- We want 2-link suite, as it has a non-trivial traffic pattern.
 - Not done here, as it needs edits in multiple layers.
+ Add 1-link suite to compare (and for 1-link testbeds).
+ Simplify also old bonding keywords.
 + Partial support for future multi-link suites.
+ Update jobspecs for minimal coverage:
 + Only add to iterative, both MRR and NDRPDR.
 - Coverage jobspecs to be updated later.
 + {1,2,4}c 64B tests, only to 3n-icx for now.
 + For both primary NIC+driver combinations there.

Change-Id: I6da3b99a44b5ae83cc52921d5e2034fe5218270c
Signed-off-by: Vratko Polak <[email protected]>