… based on testbed informaition (sonic-net#14127)

Description of PR
Summary: This PR enhances the logic for port selection for multidut RDMA cases based on the conf-name defined in the testbed.csv / testbed.yaml file. And also a generic fixture for single and multidut topology to get the snappi ports, dut port, asic_type, asic_value information
Fixes # (issue)

Approach
What is the motivation for this PR?
For enhancing the port selection logic and a generic fixture for single and multidut topology

How did you do it?
Added a pytest fixture called get_snappi_ports and get_snappi_ports_for_rdma whcih selects the ports from the information provided in MULTIDUT_PORT_INFO in variables.py and the testbed info as shown below in testbed.csv

vms-snappi-sonic,vms6-1,ptf64,docker-ptf-snappi,snappi-sonic-ptf,10.36.78.59,,Server_6,,sonic-s6100-dut1,snappi-sonic,True,Batman
vms-snappi-sonic-multidut,vms6-1,ptf64,docker-ptf-snappi,snappi-sonic-ptf,10.36.78.59,,Server_6,,[sonic-s6100-dut1;sonic-s6100-dut2],snappi-sonic,True,Batman
vms-snappi-single-dut-multi-asic,vms6-1,ptf64,docker-ptf-snappi,snappi-sonic-ptf,10.36.78.59,,Server_6,,sonic-s6100-dut1,snappi-sonic,True,Batman
vms-snappi-multi-dut-multi-asic,vms6-1,ptf64,docker-ptf-snappi,snappi-sonic-ptf,10.36.78.59,,Server_6,,[sonic-s6100-dut1;sonic-s6100-dut2],snappi-sonic,True,Batman
How did you verify/test it?
Tested the logic on pfc cases

co-authorized by: [email protected]

… based on testbed informaition (sonic-net#14127)

Description of PR
Summary: This PR enhances the logic for port selection for multidut RDMA cases based on the conf-name defined in the testbed.csv / testbed.yaml file. And also a generic fixture for single and multidut topology to get the snappi ports, dut port, asic_type, asic_value information
Fixes # (issue)

Approach
What is the motivation for this PR?
For enhancing the port selection logic and a generic fixture for single and multidut topology

How did you do it?
Added a pytest fixture called get_snappi_ports and get_snappi_ports_for_rdma whcih selects the ports from the information provided in MULTIDUT_PORT_INFO in variables.py and the testbed info as shown below in testbed.csv

vms-snappi-sonic,vms6-1,ptf64,docker-ptf-snappi,snappi-sonic-ptf,10.36.78.59,,Server_6,,sonic-s6100-dut1,snappi-sonic,True,Batman
vms-snappi-sonic-multidut,vms6-1,ptf64,docker-ptf-snappi,snappi-sonic-ptf,10.36.78.59,,Server_6,,[sonic-s6100-dut1;sonic-s6100-dut2],snappi-sonic,True,Batman
vms-snappi-single-dut-multi-asic,vms6-1,ptf64,docker-ptf-snappi,snappi-sonic-ptf,10.36.78.59,,Server_6,,sonic-s6100-dut1,snappi-sonic,True,Batman
vms-snappi-multi-dut-multi-asic,vms6-1,ptf64,docker-ptf-snappi,snappi-sonic-ptf,10.36.78.59,,Server_6,,[sonic-s6100-dut1;sonic-s6100-dut2],snappi-sonic,True,Batman
How did you verify/test it?
Tested the logic on pfc cases

co-authorized by: [email protected]