[feature] Add a release URL to builders and generators for uploading assets

[asraa]

Is your feature request related to a problem? Please describe.
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Describe the solution you'd like
For some workflow triggers like workflow_dispatch, the github.ref does not indicate the release URL. We should expose an option like

          upload_url: ${{ steps.create-release.outputs.upload_url }}

that can be used to indicate the release URL to upload assets to.

That would simplify the workflow, and reduce the amount of friction for users. Otherwise, they need to specify their own upload, or manually upload the artifact themselves.

See GoogleContainerTools/jib@e85d34e

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Additional context
Add any other context or screenshots about the feature request here.

[laurentsimon]

Repositories to update:

• https://github.com/GoogleContainerTools/jib

[laurentsimon]

We also need e2e tests for this.

[laurentsimon]

See this PR which has the code to use: https://github.com/GoogleContainerTools/jib/pull/3726/files

[ianlewis]

See this PR which has the code to use: https://github.com/GoogleContainerTools/jib/pull/3726/files

This PR uses actions/upload-release-asset which isn't maintained anymore in favor of softprops/action-gh-release which is the action we use. Maybe the right input we need use is tag_name?
https://github.com/softprops/action-gh-release#inputs

[laurentsimon]

you're correct. Note that I only re-used the GHA they already use in their code (https://github.com/GoogleContainerTools/jib/blob/master/.github/workflows/jib-cli-release.yml#L82), it's not something I asked them to use.

I've created #713 to own the code for us internally, and maybe other repos could use it?

[hazcod]

Can you mention here what release it'll end up in @laurentsimon ? Thanks!

[laurentsimon]

Should be part of the [2022 Stability improvements](https://github.com/slsa-framework/slsa-github-generator/milestone/6). Thanks for the interest! Which project do you want to use it for?

[laurentsimon]

This PR needs to be landed #1307

[hazcod]

Should be part of the [2022 Stability improvements](https://github.com/slsa-framework/slsa-github-generator/milestone/6). Thanks for the interest! Which project do you want to use it for?

Thanks! I'm writing an SDK for the API on Intigriti and want to ensure we do all of our due diligence.