Release v0.75.1, via point-release

[conorsch]

Testnet upgrade

Testnet chain id: penumbra-testnet-deimos-8 (no change)
Release date: 2023-05-23
Testnet release manager: @conorsch

We want to release a narrowly-scoped point release to fix the upgrade-plan halt behavior (#4443), in support of the upcoming chain-upgrade for 0.76.0 (#4402).

Testnet Release Manager Checklist

Pre-release:

• Prepare release/0.75.x branch from v0.75.0 tag
• Review and merge fix in pd: refuse to bootstrap services if the app is not ready #4436
• Backport PR to release branch: backport: pd: refuse to bootstrap services if the app is not ready (#4436) #4450

On release day:

• Draft an announcement for peer review to ensure changes included are comprehensive.
• Enable testnet deploy workflow, so that point-release logic updates the running nodes
• Bump the version number and push its tag, via cargo-release.
  • Run cargo release minor for a new testnet, or cargo release patch for a bugfix. For the latter, make sure you're on a dedicated release branch.
  • Push the commit and newly generated tag, e.g. v0.51.0, to the remote.
• Approve the deployment
• Wait for the "Release" workflow to complete
• Edit the newly created release object, and add a note summarizing the intent of the release
• Close faucet
• Update Galileo deployment, following docs
• Make the announcement to Discord! 🎉🎉🎉

Post-release cleanup tasks

• Ensure faucet is open

[conorsch]

Notes for later: the point-release CI job doesn't handle the solo pd nodes (#3336) gracefully: https://solo-pd.testnet.plinfra.net/ was reset and now must sync from scratch. Let's circle back and make that nicer.

[conorsch]

v0.75.1 is live: https://github.com/penumbra-zone/penumbra/releases/tag/v0.75.1 and filed #4459 to follow up on some CI fixes, which are low-pri. Focusing on v0.76.0 next (#4402).