Accurate bridge previews rollout plan

[VenelinMartinov]

The rollout plan for accurate bridge previews is intended to follow what we did with the PlanResourceChange SDKv2 bridge feature #1785.

We will enable the accurate bridge previews feature for:

• A tier 2 provider (cloudflare if it is suitable)
• All tier 2 providers
• Azure and GCP
• AWS
• Enabled by default in the bridge

In contrast to the PRC feature we might get less feedback from the rollout due to:

• Provider tests generally don't test the preview output - these won't provide any feedback
• This feature is less likely to break in obvious ways, like PRC did

We could opt for rolling out accurate bridge previews for the SDKv2 and PF separately. This means we could potentially start the rollout earlier at the cost of higher complexity. Currently this seems unlikely to be worthwhile.

[VenelinMartinov]

We have decided not to roll out PF yet as we have a meaningful regression there which is currently blocked.

#2688 will track PF rollout separately