Remove stage from model name

[tapadipti]

As discussed here

[dberenbaum]

Hi @tapadipti, per the linked discussion, WDYT of dropping the version instead of the stage?

[tapadipti]

@dberenbaum This is about creating one SageMaker model per version. This one should be per version, not per stage. So that when we deploy the same model version to different stages, SageMaker does not create separate models for them.

I'm not entirely sure if this change works, coz I haven't tried it. I made it based on what @daavoo said would work. I meant to request your (and @shcheklein's) review in a different PR. I added it to this PR by mistake.

What we need per stage is the endpoint, which @daavoo said he would update in the code.

[daavoo]

I'm not entirely sure if this change works, coz I haven't tried it. I made it based on what @daavoo said would work. I meant to request your (and @shcheklein's) review in a different PR. I added it to this PR by mistake.

The P.R. doesn't currently work as expected because the composed_name is used also for create_endpoint.
2 different names should be built from the inputs.
I will update in a different P.R.