Add ability to use server_side_apply to utils.create_from_yaml

[dcmcand]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Allows utils.create_from_yaml functions to optionally use server side apply. This is a feature that has been requested numerous times. It will allow applying a manifest more than once without throwing an error or updating manifests and reapplying (similar to how kubectl apply works).

Which issue(s) this PR fixes:

Fixes #2251
Addresses #2030
Part of #1737

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Added the ability to use the optional `apply` parameter for functions within the `utils.create_from_yaml` submodule. This allows these functions to optionally use the `DynamicClient.server_side_apply` function to apply yaml manifests.

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

[Usage]: create_from_yaml(kubernetes_client, manifest, apply=True)

[linux-foundation-easycla]

• ✅login: dcmcand / (b40eaf2)

The committers listed above are authorized under a signed CLA.

[k8s-ci-robot]

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[dcmcand]

/assign @yliaog @roycaihw

[dcmcand]

@yliaog, is there anything I can do to help get this looked at?

[dcmcand]

@yliaog @roycaihw Is there anything I can do to help get this looked at?

[troll-warlord]

When should i expect this to be released?

[marcelovilla]

Hey @yliaog @roycaihw! We could use this feature in our project. Are you planning to review this anytime soon? Thanks for all the work!

[yliaog]

sure, i'll take a look in the next couple of days.

[yliaog]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dcmcand, yliaog

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