Proposal for feature releases for tests

[marioevz]

On EEST we have the concept of features for we generate specialized test releases.

These specialized test releases have the following properties:

• They define a specific subset of tests to fill (via special fill parameters).
• Marked as pre-releases rather than full releases.
• They are generated from tags that have the following naming scheme: feature-name@v1.2.3.

When moving to EELS, this can be translated to a similar architecture:

• We retain the same tagging structure, and we tag an EELS branch with it.
• It does not generate a release on https://github.com/ethereum/execution-specs/releases, rather it creates a release only on https://github.com/ethereum/execution-spec-tests/releases with the feature-specific subset of tests.
• The definition of the tests subset is now on EELS (potentially .github/configs).
• We should be able to reuse most of the current EEST's CI workflow code.

cc @spencer-tb

[marioevz]

The softprops/action-gh-release action we use to generate releases on EEST supports changing the target repository for the release:

So, happy-path, we only have to change that input when we call that action.

[spencer-tb]

Cc-ing an example if a feature called "weld" is created:

┌─────────────────────────────────────────────────────────────────┐
│                    ethereum/eels                                │
│  ┌───────────────────────────────────────────────────────────┐  │
│  │ Developer pushes tag: weld@v0.0.1-test                    │  │
│  └───────────────────────────────────────────────────────────┘  │
│                              │                                  │
│                              ▼                                  │
│  ┌───────────────────────────────────────────────────────────┐  │
│  │ fixtures_feature.yaml workflow triggers                   │  │
│  │  - Parses feature name from tag                           │  │
│  │  - Loads config from .github/configs/feature.yaml         │  │
│  │  - Builds fixtures using EELS code + EEST actions         │  │
│  └───────────────────────────────────────────────────────────┘  │
│                              │                                  │
│                              ▼                                  │
│  ┌───────────────────────────────────────────────────────────┐  │
│  │ Release job executes                                      │  │
│  │  - Uses EEST_RELEASE_TOKEN secret                         │  │
│  │  - Calls softprops/action-gh-release                      │  │
│  │  - Specifies repository: ethereum/eest.                   │  │
│  └───────────────────────────────────────────────────────────┘  │
└────────────────────────────│────────────────────────────────────┘
                             │
                             │ Cross-repo release via PAT
                             │
                             ▼
┌─────────────────────────────────────────────────────────────────┐
│                    ethereum/eest                                │
│  ┌───────────────────────────────────────────────────────────┐  │
│  │ Draft pre-release created                                 │  │
│  │  - Tag: weld@v0.0.1-test                                  │  │
│  │  - Artifact: fixtures_weld.tar.gz                         │  │
│  │  - Status: Draft                                          │  │
│  └───────────────────────────────────────────────────────────┘  │
└─────────────────────────────────────────────────────────────────┘

[spencer-tb]

PR up. Successful release from EELS: #1608