ci: reduce the amount of API calls made by arduino/setup-protoc@v1

[gustavovalverde]

Motivation

Every few days, multiple PRs will fail with GitHub "API rate-limit exceeded" errors. These errors seem to happen when there are multiple pushes to a PR within a short period of time.

Fixes #5819

Solution

If the protoc compiler version is not available locally, the action will look for the most recent version. We use a fixed version to reduce the amount of API calls being done in all workflows, but mainly on build-crates-individually.yml

Note: A recent update on bump tj-actions/changed-files also reduced the amount of API calls, based on our actual fetch configuration.

Review

Anyone can review this

Reviewer Checklist

• Will the PR name make sense to users?
  • Does it need extra CHANGELOG info? (new features, breaking changes, large changes)
• Are the PR labels correct?
• Does the code do what the ticket and PR says?
  • Does it change concurrent code, unsafe code, or consensus rules?
• How do you know it works? Does it have tests?

Follow Up Work

[arya2]

This looks right, but the updated steps seem to fail:

Error: unable to get latest version
https://github.com/ZcashFoundation/zebra/actions/runs/3875142251/jobs/6607275825#step:3:13

[gustavovalverde]

This looks right, but the updated steps seem to fail:

Oh, that's odd. That version actually exists. I'll update this with a lower version and see how it goes.

[arya2]

Looks good!

Hopefully arduino/setup-protoc will work with later versions of protoc soon.