Skip bgp/test_bgp_fact.py for sonic-t0 testbed

[judyjoseph]

What is the motivation for this PR?

This is a follow up of the fix earlier made to skip macsec tests from pipeline t0-sonic via this PR : #9874

Even with this PR merged, there was still failures in one of the tests run in t0-sonic pipeline.

Further debugging showed that, we have this special param, to enable macsec (as shown below) which results in macsec setup with macsec enabled links which will fail again.

REF:

specific_param:

  t0-sonic:
  - name: bgp/test_bgp_fact.py
    param: "--neighbor_type=sonic --enable_macsec --macsec_profile=128_SCI,256_XPN_SCI" <<<<<<<
#  all the test modules under macsec directory
  - name: macsec
    param: "--neighbor_type=sonic --enable_macsec --macsec_profile=128_SCI,256_XPN_SCI"   <<<<<<<<
~                                                                                                                                                                                                                                                               
".azure-pipelines/pr_test_scripts.yaml" line 73 of 143 --51%-- col 1

How did you do it?

So idea here is to skip the test test_bgp_fact.py for t0-sonic pipeline alone.

How did you verify/test it?

Any platform specific information?

Supported testbed topology if it's a new test case?

Documentation

[yejianquan]

LGTM