Remove blank gh release notes being published

[greyscaled]

Release notes are automatically published (public). The author is github-actions. We prefer drafting them from a tag and releasing them manually.

Reference: (notice the author) - https://github.com/GlareDB/glaredb/releases/tag/v0.8.0

This can create subtle bugs in installing the CLI, since the install.sh script looks for target binaries in our latest release, and if a blank release is getting published, they won't exist. There could be a case where we have drafted full release notes, and can't publish them (without realizing) and what we're instead left with is a blank release.

The notes initially come out blank. If the release manager already had a draft in progress, it can no longer be published since there can only be 1 release for any given tag.

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The desired process:

• release notes are drafted from a tag
• release actions build and distribute binaries
• we publish the notes with the binaries when all checks have passed and we're ready to go live