[WIP]Add client logic for model transfer job

[ppadti]

Description

This is the follow pr to #2183
This PR aims to add the client logic to Create and update. Added tests and updated the readme file

How Has This Been Tested?

curl cmd:
GET:

curl -X GET "http://localhost:4000/api/v1/model_registry/model-registry/model_transfer_jobs?namespace=kubeflow" \
  -H "Content-Type: application/json" \
  -H "kubeflow-userid: user@example.com" 

POST:

curl -X POST "http://localhost:4000/api/v1/model_registry/model-registry-service/model_transfer_jobs?namespace=kubeflow" \
  -H "Content-Type: application/json" \
  -H "kubeflow-userid: user@example.com" \
  -d '{
    "data": {
      "name": "my-job",
      "source": {"type": "uri", "uri": "https://example.com/model.bin"},
      "destination": {"type": "oci", "uri": "quay.io/myorg/myimage:v1", "username": "myuser", "password": "mypassword"},
      "uploadIntent": "create_model",
      "registeredModelName": "My Model",
      "modelVersionName": "v1.0.0"
    }
  }'

PATCH:

curl -X PATCH "http://localhost:4000/api/v1/model_registry/model-registry-service/model_transfer_jobs/JOB_NAME?namespace=kubeflow" \
  -H "Content-Type: application/json" \
  -H "kubeflow-userid: user@example.com" \
  -d '{"data": {"name": "new-job-name"}}'

DELETE:

curl -X DELETE "http://localhost:4000/api/v1/model_registry/model-registry/model_transfer_jobs/transfer-job-001?namespace=bella-namespace" \
  -H "kubeflow-userid: user@example.com"

Merge criteria:

• All the commits have been signed-off (To pass the DCO check)

• The commits have meaningful messages
• Automated tests are provided as part of the PR for major new functionalities; testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work.
• Code changes follow the kubeflow contribution guidelines.
• For first time contributors: Please reach out to the Reviewers to ensure all tests are being run, ensuring the label ok-to-test has been added to the PR.

If you have UI changes

• The developer has added tests or explained why testing cannot be added.
• Included any necessary screenshots or gifs if it was a UI change.
• Verify that UI/UX changes conform the UX guidelines for Kubeflow.

[google-oss-prow]

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