Add a session schedule for the KubeVirt Summit

[codificat]

What this PR does / why we need it:

Add the session schedule for the KubeVirt Summit.

Does this PR fix any issue? _(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged)_:

Fixes #

Special notes for your reviewer:

[codificat]

/hold until all reviews/confirmations are in

[mazzystr]

@codificat link checker failing

[codificat]

/test kubevirt-io-presubmit-link-checker apparently there was a DNS glitch

[mazzystr]

/lgtm /approve

[mazzystr]

/approve /lgtm

[kubevirt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mazzystr

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/kubevirt/kubevirt.github.io/blob/source/OWNERS)~~ [mazzystr] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[codificat]

/hold cancel

[codificat]

A last minute change came in, let's /hold just a bit more while it gets reviewed

[codificat]

Swapped day for one of the sessions. The session itself (HCO) will change slightly (different presenter) but the schedule should be fine now. /hold cancel