chore: split tests onto their own dedicated GitHub runners (#15919)

.github/workflows/ci-backend-update-test-timing.yml

@@ -15,7 +15,7 @@ env:
 jobs:
     django:
         name: Run Django tests and save test durations
-        runs-on: ubuntu-latest
+        runs-on: ubuntu-latest-backend
         steps:
             - uses: actions/checkout@v3
 

.github/workflows/ci-backend.yml

@@ -38,7 +38,7 @@ jobs:
     # Job to decide if we should run backend ci
     # See https://github.com/dorny/paths-filter#conditional-execution for more details
     changes:
-        runs-on: ubuntu-latest
+        runs-on: ubuntu-latest-backend
         timeout-minutes: 5
         if: github.repository == 'PostHog/posthog'
         name: Determine need to run backend checks
@@ -81,7 +81,7 @@ jobs:
         timeout-minutes: 10
 
         name: Python code quality checks
-        runs-on: ubuntu-latest
+        runs-on: ubuntu-latest-backend
 
         steps:
             - uses: actions/checkout@v3
@@ -167,7 +167,7 @@ jobs:
         timeout-minutes: 5
 
         name: Validate Django migrations
-        runs-on: ubuntu-latest
+        runs-on: ubuntu-latest-backend
 
         steps:
             - uses: actions/checkout@v3
@@ -231,7 +231,7 @@ jobs:
         timeout-minutes: 30
 
         name: Django tests – ${{ matrix.segment }} (persons-on-events ${{ matrix.person-on-events && 'on' || 'off' }}), Py ${{ matrix.python-version }}, ${{ matrix.clickhouse-server-image }} (${{matrix.group}}/${{ matrix.concurrency }})
-        runs-on: ubuntu-latest
+        runs-on: ubuntu-latest-backend
 
         strategy:
             fail-fast: false
@@ -311,7 +311,7 @@ jobs:
         if: github.repository == 'PostHog/posthog' && needs.changes.outputs.backend == 'true'
 
         name: Django tests – Cloud
-        runs-on: ubuntu-latest
+        runs-on: ubuntu-latest-backend
         steps:
             - name: Fetch posthog-cloud
               run: |
@@ -410,7 +410,7 @@ jobs:
         name: Async migrations tests
         needs: changes
         if: needs.changes.outputs.backend == 'true'
-        runs-on: ubuntu-latest
+        runs-on: ubuntu-latest-backend
         steps:
             - name: 'Checkout repo'
               uses: actions/checkout@v3

.github/workflows/ci-e2e.yml

@@ -14,7 +14,7 @@ concurrency:
 
 jobs:
     changes:
-        runs-on: ubuntu-latest
+        runs-on: ubuntu-latest-e2e
         timeout-minutes: 5
         if: github.repository == 'PostHog/posthog'
         name: Determine need to run E2E checks
@@ -50,7 +50,7 @@ jobs:
     cypress_prep:
         needs: changes
         name: Cypress preparation
-        runs-on: ubuntu-latest
+        runs-on: ubuntu-latest-e2e
         timeout-minutes: 30
         outputs:
             specs: ${{ steps.set-specs.outputs.specs }}
@@ -75,7 +75,7 @@ jobs:
 
     cypress:
         name: Cypress E2E tests (${{ strategy.job-index }})
-        runs-on: ubuntu-latest
+        runs-on: ubuntu-latest-e2e
         timeout-minutes: 30
         needs: [cypress_prep, changes]
         permissions:

.github/workflows/ci-frontend.yml

@@ -17,7 +17,7 @@ concurrency:
 jobs:
     frontend-code-quality:
         name: Code quality checks
-        runs-on: ubuntu-20.04
+        runs-on: ubuntu-latest-frontend
         steps:
             - uses: actions/checkout@v3
 
@@ -58,7 +58,7 @@ jobs:
               run: pnpm schema:build:json && git diff --exit-code
 
     jest:
-        runs-on: ubuntu-20.04
+        runs-on: ubuntu-latest-frontend
         name: Jest test (${{ matrix.chunk }})
 
         strategy:

.github/workflows/ci-plugin-server.yml

@@ -44,7 +44,7 @@ concurrency:
 jobs:
     code-quality:
         name: Code quality
-        runs-on: ubuntu-22.04
+        runs-on: ubuntu-latest-pluginserver
         defaults:
             run:
                 working-directory: 'plugin-server'
@@ -74,7 +74,7 @@ jobs:
 
     tests:
         name: Tests (${{matrix.shard}})
-        runs-on: ubuntu-22.04
+        runs-on: ubuntu-latest-pluginserver
 
         strategy:
             fail-fast: false
@@ -159,7 +159,7 @@ jobs:
 
     functional-tests:
         name: Functional tests (POE_EMBRACE_JOIN_FOR_TEAMS=${{matrix.POE_EMBRACE_JOIN_FOR_TEAMS}})
-        runs-on: ubuntu-latest-8-cores
+        runs-on: ubuntu-latest-pluginserver
 
         strategy:
             fail-fast: false
@@ -263,7 +263,7 @@ jobs:
         # comparable results, but rather to give a rough idea of how
         # ingestion performance changes over time.
 
-        runs-on: ubuntu-latest-8-cores
+        runs-on: ubuntu-latest-pluginserver
 
         env:
             DEBUG: 'true'

.github/workflows/storybook-chromatic.yml

@@ -49,7 +49,7 @@ jobs:
 
     visual-regression:
         name: Visual regression tests
-        runs-on: ubuntu-20.04
+        runs-on: ubuntu-latest-frontend
         timeout-minutes: 30
         container:
             image: mcr.microsoft.com/playwright:v1.29.2
@@ -191,7 +191,7 @@ jobs:
 
     visual-regression-summary:
         name: Summarize visual regression tests
-        runs-on: ubuntu-20.04
+        runs-on: ubuntu-latest-frontend
         timeout-minutes: 5
         needs: visual-regression
         if: always() # Run even if visual-regression fails for one (or more) of the browsers

.github/workflows/storybook-deploy.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
     storybook-deployment:
-        runs-on: ubuntu-latest
+        runs-on: ubuntu-latest-frontend
         if: github.repository == 'PostHog/posthog'
         steps:
             - name: Check out PostHog/posthog repo