Incremental updates and improvements to the OCI (Instance-Pool) cloud provider

[jlamillan]

Which component this PR applies to?

cluster-autoscaler (OCI provider code)

What type of PR is this?

/kind cleanup
/kind feature

What this PR does / why we need it:

This PR adds a number of incremental updates and other improvements to the OCI (Instance-Pool) cloud provider after after running the initial version in production for several weeks including:

• dynamic timeout adjustment logic of provider operations based on scale size, lack of progress, etc.
• support handling paginated API responses from provider
• support for taking advantage of optional instance pool and instance ID labels on nodes
• support for retrieving OCI Instance-Pool shape information from cache
• updated Docker image coordinates in example manifests

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

I am the original author of the provider code in question and listed in the OWNERS file (although I am temporarily commented out until I complete the Kubernetes Community Membership process).

Does this PR introduce a user-facing change?

Incremental updates and improvements. 

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[mwielgus]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jlamillan, mwielgus

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• cluster-autoscaler/OWNERS [mwielgus]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment