[sdn_tests]:Adding Gnmi Stress test helper to pins_ondatra.

[VSuryaprasad-HCL]

Description of PR

• [sdn_tests]:Adding Gnmi Stress test helper to pins_ondatra.

Summary:

• Added Gnmi Stress test helper to pins_ondatra.

Build Result:

~/JUNE-0906-1/sonic-mgmt/sdn_tests/pins_ondatra$ bazel build ...
INFO: Analyzed 8 targets (23 packages loaded, 102 targets configured).
INFO: Found 8 targets...
INFO: Elapsed time: 3.820s, Critical Path: 1.16s
INFO: 24 processes: 1 internal, 23 linux-sandbox.
INFO: Build completed successfully, 24 total actions

~/JUNE-0906-1/sonic-mgmt/sdn_tests/pins_ondatra$ bazel build tests:gnmi_stress_helper 
INFO: Analyzed target //tests:gnmi_stress_helper (0 packages loaded, 0 targets configured).
INFO: Found 1 target...
Target //tests:gnmi_stress_helper up-to-date:
bazel-bin/tests/gnmi_stress_helper.a
INFO: Elapsed time: 0.372s, Critical Path: 0.00s
INFO: 1 process: 1 internal.
INFO: Build completed successfully, 1 total action

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• [-] Test case(new/improvement)

Back port request

• 202012
• 202205
• 202305
• 202311
• 202405

Approach

What is the motivation for this PR?

How did you do it?

How did you verify/test it?

Any platform specific information?

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

Documentation

• HLD - SDN Test framework for SONiC - SDN Test framework for SONiC #11771