fix(ci): remove deploy-packages empty commits

[philpax]

Before #1225, nightly builds would create a PR that consisted of three commits:

• Update the version of Ambient to the desired version
• Deploy all packages, making a commit with the new deployment IDs
• Revert the version back to -dev, except for the deployed packages

However, after that PR, deployment IDs are no longer used; instead, package versions are used, which are set by the first commit (update-version). This means that the second commit was empty, causing failures.

To fix this, I've removed the second commit (as it's implied by the first commit), as well as the corresponding step for tagged builds (actually not sure about this one, following up with Kuba)

[philpax]

Merging this to fix nightlies, but a complete fix is being put together in #1230