fix: create_repository should returns repository_url instead of registry info

[jjmachan]

Description

Currently the create_repository return the url for registry but we want to use the repository url .

Motivation and Context

How Has This Been Tested?

Checklist:

• My code follows the bentoctl code style, both make format and
  make lint script have passed
• My change reduces project test coverage and requires unit tests to be added
• I have added unit tests covering my code change
• My change requires a change to the documentation
• I have updated the documentation accordingly

[codecov]

Codecov Report

Merging #129 (812076b) into main (91191ba) will not change coverage.
The diff coverage is 50.00%.

@@           Coverage Diff           @@
##             main     #129   +/-   ##
=======================================
  Coverage   72.22%   72.22%           
=======================================
  Files          16       16           
  Lines         893      893           
=======================================
  Hits          645      645           
  Misses        248      248           

Flag	Coverage Δ
unit-tests	72.22% <50.00%> (ø)

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Impacted Files	Coverage Δ
bentoctl/deployment_config.py	66.66% <25.00%> (ø)
bentoctl/cli/__init__.py	86.90% <100.00%> (ø)

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[jjmachan]

Need to merge bentoml/aws-sagemaker-deploy#35 and bentoml/aws-lambda-deploy#37