Add drain duration information

[razo7]

Provide feedback for long running drain operations by adding two fields regarding their progress in the nodemaintenance CR status.

• Add two status fields, DrainProgress and LastUpdate , for gathering information about the drain progress and when the progress is stalled.
• Fix maintanance to maintenance appearances in the code,

[razo7]

I used crd:allowDangerousTypes=true for using float64 in the CRD after getting the following notification/error when running make manifests:

"found float, the usage of which is highly discouraged, as support for them varies across languages. Please consider serializing your float as string instead. If you are really sure you want to use them, re-run with crd:allowDangerousTypes=true"

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: razo7

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: - ~~[OWNERS](https://github.com/medik8s/node-maintenance-operator/blob/main/OWNERS)~~ [razo7] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: razo7

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: - ~~[OWNERS](https://github.com/medik8s/node-maintenance-operator/blob/main/OWNERS)~~ [razo7] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[razo7]

• The use of float64 turns out to be redundant and less accurate than int or metava1.Time.
• elapsedTime considers the offset of now versus creation time whileLastUpdate is the offset of now versus last update time, thus it gives better input for the user about a long drain operation.

[razo7]

/retest

[razo7]

/retest

[razo7]

/retest

[razo7]

AWS CI is flaky today (something is wrong with the last image release for OCP 4.11 in AWS).

unable to import latest release image: imagestream.image.openshift.io "release" not found

[razo7]

/retest

[slintes]

/lgtm