Improve upload artifact to builds.hex.pm workflow

[wingyplus]

In this changeset, I changed the upload workflow to upload after we built the release artifact. So the flow will be changed to:

You can see the demo at https://github.com/wingyplus/elixir/actions/runs/11056313905.

The pros of this way is we have only a single workflow, can reuse all both nightly (main) and release (v*) versions.

I have a few tasks left to unlock the draft:

• Uncomment Fastly flush cache. I cannot test this step by myself because I have no Fastly setup. :(
• Make update builds.txt works.
• Remove builds.hex.pm.yml

Before continue those tasks above, is this PR ok for you?

[wojtekmach]

@wingyplus yup, the direction looks good to me!

[wojtekmach]

Uncomment Fastly flush cache. I cannot test this step by myself because I have no Fastly setup. :(

If it's easy enough to move that into a separate step, perhaps guarding it like the following will help you?

name: Flush Fastly cache
if: github.repository == 'elixir-lang/elixir'
run: |
  ...

[wingyplus]

@wojtekmach The PR is ready to review now. 🙏

Uncomment Fastly flush cache. I cannot test this step by myself because I have no Fastly setup. :(

If it's easy enough to move that into a separate step, perhaps guarding it like the following will help you?

name: Flush Fastly cache
if: github.repository == 'elixir-lang/elixir'
run: |
  ...

That's a good idea. I will try it tomorrow. 👍

[wingyplus]

@wojtekmach The PR is ready to review now. 🙏

Uncomment Fastly flush cache. I cannot test this step by myself because I have no Fastly setup. :(

If it's easy enough to move that into a separate step, perhaps guarding it like the following will help you?

name: Flush Fastly cache
if: github.repository == 'elixir-lang/elixir'
run: |
  ...

That's a good idea. I will try it tomorrow. 👍

Done! Here is the demo https://github.com/wingyplus/elixir/actions/runs/11056148036/job/30717118796. The flush cache disabled because of if guard.