Why I did it
Require multi-asic VS tests to be run during PR checks and merges in master branch.
How I did it
Add job to run multi-asic VS tests in sonic-buildimage pipeline. Currently pipeline will run basic bgp fact test to ensure the testbed comes up, load minigraph works and bgp sessions are up.
Use new multi-asic VS agent pool sonictest-ma in official-multi-asic-vs pipeline
Make multi-asic VS test optional for now. There are two known issues:
Announce route failure during refresh-dut in setup testbed stage.
bgp sessions not getting established.
How to verify it
Tested using test azure pipelines.
Why I did it
To be able to run VS test on official multi asic VS image.
How I did it
Add a new script to build multi-asic VS image by passing NUM_ASIC build parameter.
Rung multi-asic t1-lag test cases with the built image.
