Adding Test Cases for Create, Remove api Objects

[selldinesh]

Description of PR

Summary: Contributing SAI test cases that qualifies the SAI apis. This PR consists of test cases that does create and remove operation on the API.
The cases have been validated to be passing on:

Sonic Version: SONiC.master.182904-b774ebfdc,
HwSKU: Accton-AS7726-32X
ASIC: broadcom
SAI-Challenger Version: 2241a1a

[andriy-kokhan]

@selldinesh , thank you for the contribution!
Please make sure all commits are signed off. For more details, please refer to https://github.com/opencomputeproject/SAI-Challenger/blob/main/CONTRIBUTING.md

[andriy-kokhan]

Please include these TCs into CI/CD for a standalone workflow https://github.com/opencomputeproject/SAI-Challenger/blob/main/.github/workflows/sc-docker-standalone-bldr.yml
E.g., to add for Redis API:

    - name: Run API tests
      run: ./exec.sh --no-tty pytest --testbed=saivs_standalone -v -k "api/test"

[andriy-kokhan]

Please include these TCs into CI/CD for a standalone workflow https://github.com/opencomputeproject/SAI-Challenger/blob/main/.github/workflows/sc-docker-standalone-bldr.yml E.g., to add for Redis API:

    - name: Run API tests
      run: ./exec.sh --no-tty pytest --testbed=saivs_standalone -v -k "api/test"

@selldinesh , please include these TCs into GitHub workflow. Ideally, they should be validated for both Redis and Thrift RPC. Thanks