chore: migrate GitHub workflows from Buildjet to Blacksmith (#26247)

* chore: migrate GitHub workflows from Buildjet to Blacksmith

- Replace buildjet-*vcpu-ubuntu-2204 runners with blacksmith-*vcpu-ubuntu-2204
- Replace buildjet/cache@v4 with actions/cache@v4
- Replace buildjet/setup-node@v4 with actions/setup-node@v4
- Replace buildjet/cache-delete@v1 with useblacksmith/cache-delete@v1
- Rename delete-buildjet-cache.yml to delete-blacksmith-cache.yml

Co-Authored-By: keith@cal.com <keithwillcode@gmail.com>

* chore: bump Blacksmith runners to Ubuntu 24.04

Co-Authored-By: keith@cal.com <keithwillcode@gmail.com>

* Reduce 16vcpu to 4vcpu for the API v2 E2E

* Remove 8vcpu usage

* chore: switch Blacksmith runners to ARM architecture

Co-Authored-By: keith@cal.com <keithwillcode@gmail.com>

* chore: switch Blacksmith runners back to AMD (remove -arm suffix)

Co-Authored-By: keith@cal.com <keithwillcode@gmail.com>

* fix: improve test cleanup to cover all bookings including reassignment-created ones

- Changed afterEach cleanup to find all bookings by eventTypeId instead of tracking bookingIds
- This ensures bookings created indirectly by managedEventManualReassignment are also cleaned up
- Removed problematic prefix-based deleteMany calls that could affect parallel tests
- Fixes idempotencyKey collision errors on high-parallelism CI runners

Co-Authored-By: keith@cal.com <keithwillcode@gmail.com>

* fix: improve icons screenshot test stability with deviceScaleFactor and increased threshold

Co-Authored-By: keith@cal.com <keithwillcode@gmail.com>

* fix: cap Playwright workers to 4 to match vCPU allocation on Blacksmith runners

Co-Authored-By: keith@cal.com <keithwillcode@gmail.com>

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

.github/actions/cache-db/action.yml

@@ -16,7 +16,7 @@ runs:
   steps:
     - name: Cache database
       id: cache-db
-      uses: buildjet/cache@v4
+      uses: actions/cache@v4
       env:
         cache-name: cache-db
         key-1: ${{ hashFiles('packages/prisma/schema.prisma', 'packages/prisma/migrations/**/**.sql', 'packages/prisma/*.ts') }}

.github/actions/yarn-install/action.yml

@@ -20,7 +20,7 @@ runs:
   using: "composite"
   steps:
     - name: Use Node ${{ inputs.node_version }}
-      uses: buildjet/setup-node@v4
+      uses: actions/setup-node@v4
       with:
         node-version: ${{ inputs.node_version }}
     - name: Expose yarn config as "$GITHUB_OUTPUT"
@@ -32,7 +32,7 @@ runs:
     # Yarn rotates the downloaded cache archives, @see https://github.com/actions/setup-node/issues/325
     # Yarn cache is also reusable between arch and os.
     - name: Restore yarn cache
-      uses: buildjet/cache@v4
+      uses: actions/cache@v4
       id: yarn-download-cache
       with:
         path: ${{ steps.yarn-config.outputs.CACHE_FOLDER }}
@@ -41,7 +41,7 @@ runs:
     # Invalidated on yarn.lock changes
     - name: Restore node_modules
       id: yarn-nm-cache
-      uses: buildjet/cache@v4
+      uses: actions/cache@v4
       with:
         path: "**/node_modules/"
         key: ${{ runner.os }}-yarn-nm-cache-${{ hashFiles('yarn.lock', '.yarnrc.yml') }}
@@ -49,7 +49,7 @@ runs:
     # Invalidated on yarn.lock changes
     - name: Restore yarn install state
       id: yarn-install-state-cache
-      uses: buildjet/cache@v4
+      uses: actions/cache@v4
       with:
         path: .yarn/ci-cache/
         key: ${{ runner.os }}-yarn-install-state-cache-${{ hashFiles('yarn.lock', '.yarnrc.yml') }}

.github/actions/yarn-playwright-install/action.yml

@@ -9,7 +9,7 @@ runs:
       run: echo "PLAYWRIGHT_VERSION=$(node -e "console.log(require('./package.json').devDependencies['@playwright/test'])")" >> $GITHUB_ENV
     - name: Cache playwright binaries
       id: playwright-cache
-      uses: buildjet/cache@v4
+      uses: actions/cache@v4
       with:
         path: |
           ~/Library/Caches/ms-playwright