Make decision on tagging strategy

[timflannagan]

We need to get consensus on the right tagging strategy for this project going forward:

• Start fresh: v0.x
• Continue with the gloo fork cadence: v1.x
• Lean into proper semver strategy: v2.x

Psuedoblocks #10441.

[timflannagan]

Quick update after discussing this more with maintainers: there's zero appetite for v0.x (for several, valid reasons), and there was merit to both the 1.x and 2.x options. Ultimately, we're leaning towards a 2.x version scheme given 1.) the reduced project scope and goals, 2.) moving towards a vendor neutral approach (e.g. removing solo.io references in GVKs) 3.) expected breaking changes in both API and behavior as we finalize the transition from the solo-io organization to this new organization.

[lgadban]

We will move forward with 2.x

[lgadban]

#10607 will track the implementation needed for this