ref(ci): Use a single CI workflow for tests

This is an initial implementation to solve the re-building of our Docker image, which is being built multiple times by our Github Actions.

This is meant to fix -> devops: Build CI Docker runs twice for every PR #7816

.github/workflows/ci-tests.yml

@@ -0,0 +1,146 @@
+# This workflow builds a Zebra Docker image and runs integration and unit tests
+# on the Zebra codebase. It is designed to add the different test workflows
+name: Run tests
+
+# Ensures that only one workflow task will run at a time. Previous builds, if
+# already in process, will get cancelled. Only the latest commit will be allowed
+# to run, cancelling any workflows in between
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+on:
+  schedule:
+    # Run this job every Friday at mid-day UTC
+    # This is limited to the Zebra and lightwalletd Full Sync jobs
+    # TODO: we should move this behavior to a separate workflow
+    - cron: "0 12 * * 5"
+
+  workflow_dispatch:
+    inputs:
+      network:
+        default: "Mainnet"
+        description: "Network to deploy: Mainnet or Testnet"
+        required: true
+      regenerate-disks:
+        type: boolean
+        default: false
+        description: "Just run a Zebra checkpoint sync and update checkpoint disks"
+        required: true
+      run-full-sync:
+        type: boolean
+        default: false
+        description: "Just run a Zebra full sync on `network`, and update tip disks"
+        required: true
+      run-lwd-sync:
+        type: boolean
+        default: false
+        description: "Just run a lightwalletd full sync and update tip disks"
+        required: true
+      force_save_to_disk:
+        required: false
+        type: boolean
+        default: false
+        description: "Force tests to always create a cached state disk, if they already create disks"
+      no_cache:
+        description: "Disable the Docker cache for this build"
+        required: false
+        type: boolean
+        default: false
+
+  pull_request:
+    # Skip PRs where Rust code and dependencies aren't modified.
+    paths:
+      # code and tests
+      - "**/*.rs"
+      # hard-coded checkpoints and proptest regressions
+      - "**/*.txt"
+      # test data snapshots
+      - "**/*.snap"
+      # dependencies
+      - "**/Cargo.toml"
+      - "**/Cargo.lock"
+      # configuration files
+      - ".cargo/config.toml"
+      - "**/clippy.toml"
+      # workflow definitions
+      - "docker/**"
+      - ".dockerignore"
+      - ".github/workflows/ci-tests.yml"
+      - ".github/workflows/sub-deploy-integration-tests-gcp.yml"
+      - ".github/workflows/sub-find-cached-disks.yml"
+      - ".github/workflows/sub-build-docker-image.yml"
+
+  push:
+    # Skip main branch updates where Rust code and dependencies aren't modified.
+    branches:
+      - main
+    paths:
+      # code and tests
+      - "**/*.rs"
+      # hard-coded checkpoints and proptest regressions
+      - "**/*.txt"
+      # test data snapshots
+      - "**/*.snap"
+      # dependencies
+      - "**/Cargo.toml"
+      - "**/Cargo.lock"
+      # configuration files
+      - ".cargo/config.toml"
+      - "**/clippy.toml"
+      # workflow definitions
+      - "docker/**"
+      - ".dockerignore"
+      - ".github/workflows/ci-tests.yml"
+      - ".github/workflows/sub-deploy-integration-tests-gcp.yml"
+      - ".github/workflows/sub-find-cached-disks.yml"
+      - ".github/workflows/sub-build-docker-image.yml"
+
+env:
+  RUST_LOG: ${{ vars.RUST_LOG }}
+  RUST_BACKTRACE: ${{ vars.RUST_BACKTRACE }}
+  RUST_LIB_BACKTRACE: ${{ vars.RUST_LIB_BACKTRACE }}
+  COLORBT_SHOW_HIDDEN: ${{ vars.COLORBT_SHOW_HIDDEN }}
+  CARGO_INCREMENTAL: ${{ vars.CARGO_INCREMENTAL }}
+
+#! IMPORTANT
+#!
+#! The job names in `ci-tests.yml`, `ci-tests.patch.yml` and `ci-tests-.patch-external.yml`
+#! must be kept in sync.
+jobs:
+  # Build the docker image used by the tests.
+  #
+  # The default network in the Zebra config in the image is mainnet, unless a manually triggered
+  # workflow or repository variable is configured differently. Testnet jobs change that config to
+  # testnet when running the image.
+  build:
+    name: Build CI image
+    # Skip PRs from external repositories, let them pass, and then Mergify will check them
+    if: ${{ !startsWith(github.event_name, 'pull') || !github.event.pull_request.head.repo.fork }}
+    uses: ./.github/workflows/sub-build-docker-image.yml
+    with:
+      dockerfile_path: ./docker/Dockerfile
+      dockerfile_target: tests
+      image_name: ${{ vars.CI_IMAGE_NAME }}
+      no_cache: ${{ inputs.no_cache || false }}
+      rust_backtrace: full
+      rust_lib_backtrace: full
+      rust_log: info
+
+  # Runs Zebra unit tests
+  unit-tests:
+    name: Unit tests
+    # Skip Unit tests when the event is a scheduled run, as this is just needed for integration tests
+    if: ${{ github.event_name != 'schedule' }}
+    needs: build
+    uses: ./.github/workflows/sub-ci-unit-tests-docker.yml
+    with:
+      image_digest: ${{ needs.build.outputs.image_digest }}
+    secrets: inherit
+
+  # Runs Zebra integration tests
+  integration-tests:
+    name: Integration tests
+    needs: build
+    uses: ./.github/workflows/sub-ci-integration-tests-gcp.yml
+    secrets: inherit