Move vscode and r-studio to the base layer in ODH

[atheo89]

Move vs code, r-studio, and cuda r-studio to the base layer to be included as defaults

Ref Issue: #283

Description

This PR vs code, r-studio, and cuda r-studio to the base layer and removes them from the additional

How Has This Been Tested?

1. Deploy the operator by using the following config on the DataScienceCluster object

    workbenches:
      devFlags:
        manifests:
          - contextDir: components/odh-notebook-controller/config
            sourcePath: ''
            uri: 'https://github.com/opendatahub-io/kubeflow/tarball/v1.7.0-5'
          - contextDir: components/notebook-controller/config
            sourcePath: ''
            uri: 'https://github.com/opendatahub-io/kubeflow/tarball/v1.7.0-5'
          - contextDir: ''
            sourcePath: base
            uri: 'https://github.com/opendatahub-io/notebooks/tarball/pull/300/head'
      managementState: Managed

2. Ensure that the images are there
   

3. Spin up any of these three notebooks and check that they are working as expected.

Merge criteria:

• The commits are squashed in a cohesive manner and have meaningful messages.
• 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

[harshad16]

lgtm
some suggestion

[harshad16]

/lgtm
/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: harshad16, jstourac

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