[stable/airflow] Allowing for specifying a NodePort number for Flower

[alexbegg]

What this PR does / why we need it:

There previously was no way to specify a port when using the NodePort service type for Flower, this adds that ability. Adding in the NodePort values the same exact way it is provided for Web. Also changing the multiple if lines to a single line.

There was no reason to change the README because it just lists flower.service.* and then says <see values.yaml>.

Which issue this PR fixes

(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged)

• fixes #

Special notes for your reviewer:

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• DCO signed
• Chart Version bumped
• Variables are documented in the README.md
• Title of the PR starts with chart name (e.g. [stable/mychartname])

[k8s-ci-robot]

Hi @alexbegg. Thanks for your PR.

I'm waiting for a helm 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.

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[alexbegg]

/assign @thesuperzapper

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[alexbegg]

@gsemet @thesuperzapper @maver1ck anyone want to review this?

[thesuperzapper]

Other than the version thing, looks good.

[gsemet]

thanks for the PR and for review !

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alexbegg, gsemet

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• stable/airflow/OWNERS [gsemet]

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