Add local-queue annotation to use created local queue by default in g…

[abhijeet-dhumal]

Issue link

opendatahub-io/distributed-workloads#198

What changes have been made

• Use annotation to allow creating raycluster using default local-queue created in given namespace
• Add support for providing AWS_DEFAULT_REGION environment variable

Verification steps

Checks

• I've made sure the tests are passing.
• Testing Strategy
  • Unit tests
  • Manual tests
  • Testing is not required for this change

[Srihari1192]

lgtm

[astefanutti]

/lgtm

[astefanutti]

@abhijeet-dhumal could you make sure to run openshift-goimports so it passes the checks.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: abhijeet-dhumal, astefanutti, Srihari1192

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