doc/devel: update development guide with e2e information

[mtulio]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

Updated development guide with information targeting to enhance the project helping non-frequent contributors to onboard into the e2e suite and test grid.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @mtulio. Thanks for your PR.

I'm waiting for a kubernetes 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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[mtulio]

cc @elmiko @kmala

[cartermckinnon]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cartermckinnon

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