[blog]: Kubeflow spark operator launch blog

[vara-bonthu]

Description

This PR introduces the launch blog post for the new Kubeflow Spark Operator.

@andreyvelich

[jbottum]

I gave it a quick read. Looks pretty good. Will read again and provide any detailed comments. Thanks for driving this!

[andreyvelich]

We want to publish this blog post this week. Please let us know for any changes/suggestions.
/assign @kubeflow/wg-data-leads @kubeflow/kubeflow-steering-committee @StefanoFioravanzo @akgraner

[terrytangyuan]

/lgtm

[terrytangyuan]

/hold

[vara-bonthu]

@terrytangyuan, the blog has been updated with the date for the first community meeting. Please review it, and if you're satisfied, it's ready for merge. Thank you!

@andreyvelich @yuchaoran2011

[andreyvelich]

We should be ready to merge it
/lgtm
/approve
@vara-bonthu @yuchaoran2011 Feel free to un-hold this PR when you are ready.

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andreyvelich, terrytangyuan, vara-bonthu

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[vara-bonthu]

/unhold