Add checks to validate versions of kubectl and aws-cli installed

[viveklak]

Proposed changes

With this change we validate a minimum version of kubectl and aws-cli. An error like this if an unsupported version of kubectl or aws-cli is installed is returned:

pulumi up                           
Previewing update (dev2)

View Live: https://app.pulumi.com/vivek/example-cluster/dev2/previews/21054be6-1c08-4214-9425-d9dda4447d52

     Type                  Name                  Plan       Info
 +   pulumi:pulumi:Stack   example-cluster-dev2  create     1 error
 +   └─ eks:index:Cluster  example-cluster-1     create     
 
Diagnostics:
  pulumi:pulumi:Stack (example-cluster-dev):
    error: Running program '/Users/vivek/code/pulumi-eks/examples/cluster' failed with an unhandled exception:
    Error: At least v1.24.0 of kubectl is required. Current version is: 1.23.0. See https://kubernetes.io/docs/tasks/tools/install-kubectl/#install-kubectl for instructions on installing the latest.
        at Object.assertCompatibleKubectlVersionExists (/Users/vivek/code/pulumi-eks/nodejs/eks/dependencies.ts:48:15)
        ...

Diagnostics:
  pulumi:pulumi:Stack (example-cluster-dev):
    error: Running program '/Users/vivek/code/pulumi-eks/examples/cluster' failed with an unhandled exception:
    Error: At least v2.7.0 of aws-cli is required. Current version is: 2.6.8. See https://docs.aws.amazon.com/cli/latest/userguide/getting-started-install.html for installation instructions.
        at Object.assertCompatibleAWSCLIExists (/Users/vivek/code/pulumi-eks/nodejs/eks/dependencies.ts:70:23)
        at createCore (/Users/vivek/code/pulumi-eks/nodejs/eks/cluster.ts:355:5)
...

Related issues (optional)

Fixes #721

[github-actions]

Does the PR have any schema changes?

Looking good! No breaking changes found.
No new resources/functions.

[github-actions]

Does the PR have any schema changes?

Looking good! No breaking changes found.
No new resources/functions.

[github-actions]

Does the PR have any schema changes?

Looking good! No breaking changes found.
No new resources/functions.

[stack72]

This is a wonderful solution! Thank you :)

[github-actions]

Does the PR have any schema changes?

Looking good! No breaking changes found.
No new resources/functions.

[github-actions]

Does the PR have any schema changes?

Looking good! No breaking changes found.
No new resources/functions.