Add ExpandVolume (storage scaling) features, tests, and deployment artifacts

[jmwurst]

Is this a bug fix or adding new feature?
New feature

What is this PR about? / Why do we need it?

• Adds EXPAND_VOLUME controller capability for the FSx CSI driver
• Updates deployment strategies (Helm, kustomize) with external-resizer container for resizing operations
• New code is covered by new unit tests
• Documentation updates
• Minor nit/typo fixes

What testing is done?
make test and live testing with FSx/EKS

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[k8s-ci-robot]

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[k8s-ci-robot]

Hi @jmwurst. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[jmwurst]

I signed it

[wongma7]

/ok-to-test

[wongma7]

These are being skipped because they depend on our test declaring that the driver supports dynamic provisioning (see the commented code block above). https://prow.k8s.io/view/gs/kubernetes-jenkins/pr-logs/pull/kubernetes-sigs_aws-fsx-csi-driver/209/pull-aws-fsx-csi-driver-e2e/1446485838421561344 skipped tests, 'AWS FSx CSI Driver End-to-End Tests: FSx CSI Driver Conformance [Driver: fsx.csi.aws.com] [Testpattern: Dynamic PV (default fs)(allowExpansion)] volume-expand Verify if offline PVC expansion works' is among them.

As long as you have tested the feature end-to-end on your own cluster I do not think this issue should block the PR. I am just pointing it out so we can remember to set up this CI testing in the future. It should be part of the larger effort to untangle the test/e2e directory and its dynamic provisioning tests to improve e2e coverage. #189

[jmwurst]

I have performed extensive testing on EKS clusters to ensure this will work. I figured I'd add the line for whenever a PR is merged in addressing #189 and #206.

[wongma7]

/check-cla
/lgtm

[wuxingro]

/lgtm
/approved

[k8s-ci-robot]

@wuxingro: changing LGTM is restricted to collaborators

In response to this:

/lgtm

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[wongma7]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jmwurst, wongma7

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