[Mobile Replay] Add banner re: grace period for beta organizations after GA

[jas-kas]

TODO for Jan 6 2025

Add banner on Replay Index re: grace period for Mobile Replay beta organizations after GA (targeting Jan 6)

• Mention there is a two month grace period of unlimited usage until March 6, and after that, you need to pay for additional replays not included in your plan
• Link to Replay pricing page (https://docs.sentry.io/pricing/#replays-pricing)
• Need hard-coded list of beta organizations

[getsantry]

Routing to @getsentry/product-owners-replays for triage ⏲️