Direct Link Changes for VLAN Mapping Dedicated Feature

[MalarvizhiK]

PR summary

Fixes: <! -- link to issue -->

PR Checklist

Please make sure that your PR fulfills the following requirements:

• [ ] The commit message follows the Angular Commit Message Guidelines.
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

PR Type

• [ ] Bugfix
• [ ] Feature
• [ ] Code style update (formatting, local variables)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] New tests
• [ ] Build/CI related changes
• [ ] Documentation content changes
• [ ] Other (please describe)

What is the current behavior?

What is the new behavior?

Does this PR introduce a breaking change?

• [ ] Yes
• [ ] No

Other information

[MalarvizhiK]

My local test cases are passing

------------------------------
malark@Malars-MacBook-Pro networking-go-sdk % go test -v ./directlinkv1
=== RUN   TestDirectLinkV1
Running Suite: DirectLinkV1 Suite
=================================
Random Seed: 1709743568
Will run 328 of 328 specs
••
Ran 328 of 328 Specs in 524.008 seconds
SUCCESS! -- 328 Passed | 0 Failed | 0 Pending | 0 Skipped
--- PASS: TestDirectLinkV1 (524.10s)
PASS
ok      github.com/IBM/networking-go-sdk/directlinkv1   525.320s