Combine Steering and TO Committees

[evankanderson]

Changes

• Unify the Steering Committee and TOC.
• Adjust the future membership to consist of 4 elected seats, 1 end-user seat, and up to 2 selected seats to balance the set of skills on the committee.

This is based on https://github.com/knative/community/issues/1549#issuecomment-2147974257, but I've adjusted the Steering-appointed ("selected") seats to be optional and 1-year terms rather than 2-year terms with staggered appointment. I don't feel strongly about this, but it seemed to provide more flexibility.

Relates to #1549

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[psschwei]

+1 non-binding (not on steering [yet... :) ])

[aliok]

Thanks for the PR @evankanderson !

+1 from me overall, just had some questions and comments.

[evankanderson]

I got around to updating this. I'd appreciate votes from both Steering and TOC on this, as it's effectively collapsing the two efforts into one.

[aliok]

+1

[dsimansk]

+1

[nrrso]

+1

[aliok]

+1

[davidhadas]

+1

[salaboy]

+1

[dprotaso]

+1

[evankanderson]

I see (required) +1 votes from:

@salaboy @aliok @nrrso @evankanderson (implicit)

I see (advisory) +1 votes from:

@dprotaso @davidhadas @psschwei @dsimansk

I believe this is a sufficient majority to proceed, so I will need an /lgtm from one of the above.