[sdn_tests]: Adding Ethernet Counter Ipv6-Discards Check test to pins_ondatra.

[divyagayathri-hcl]

Description of PR

• [sdn_tests]: Adding Ethernet Counter Ipv6-Discards Check test to pins_ondatra.

Summary:

• Added Ethernet Counter Ipv6-Discards Check test to pins_ondatra.

Build Results:

INFO: From Generating Descriptor Set proto_library @com_github_openconfig_gnsi//credentialz:credentialz_proto:
github.com/openconfig/gnsi/credentialz/credentialz.proto:21:1: warning: Import github.com/openconfig/gnsi/version/version.proto is unused.
INFO: From Generating Descriptor Set proto_library @com_github_openconfig_gnsi//pathz:pathz_proto:
github.com/openconfig/gnsi/pathz/authorization.proto:43:1: warning: Import github.com/openconfig/gnsi/version/version.proto is unused.
github.com/openconfig/gnsi/pathz/pathz.proto:25:1: warning: Import github.com/openconfig/gnsi/version/version.proto is unused.
INFO: Elapsed time: 319.016s, Critical Path: 124.45s
INFO: 975 processes: 251 internal, 724 linux-sandbox.
INFO: Build completed successfully, 975 total actions

Fixes # (issue)

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