ci: use self-hosted GHA runner

Closes #181

Author: ligurio

.github/workflows/cflite_batch.yml

@@ -15,14 +15,15 @@ permissions: read-all
 
 jobs:
   luajit:
-    runs-on: ubuntu-24.04
+    runs-on: self-hosted
     strategy:
       fail-fast: false
       matrix:
         sanitizer: [address, undefined]
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/setup
+        if: runner.environment == 'github-hosted'
       - name: Build fuzzing tests (${{ matrix.sanitizer }})
         id: build
         uses: google/clusterfuzzlite/actions/build_fuzzers@main

.github/workflows/cflite_build.yml

@@ -10,14 +10,15 @@ permissions: read-all
 
 jobs:
   luajit:
-    runs-on: ubuntu-24.04
+    runs-on: self-hosted
     strategy:
       fail-fast: false
       matrix:
         sanitizer: [address, undefined]
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/setup
+        if: runner.environment == 'github-hosted'
       - name: Build fuzzing tests (${{ matrix.sanitizer }})
         id: build
         uses: google/clusterfuzzlite/actions/build_fuzzers@main

.github/workflows/cflite_cron.yml

@@ -16,10 +16,11 @@ jobs:
 # are covered by fuzzing.
 
   Coverage:
-    runs-on: ubuntu-24.04
+    runs-on: self-hosted
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/setup
+        if: runner.environment == 'github-hosted'
       - name: Build fuzzing tests
         id: build
         uses: google/clusterfuzzlite/actions/build_fuzzers@main
@@ -46,7 +47,7 @@ jobs:
 # code coverage.
 
   Pruning:
-    runs-on: ubuntu-24.04
+    runs-on: self-hosted
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/setup

.github/workflows/cflite_pr.yml

@@ -42,14 +42,15 @@ permissions: read-all
 
 jobs:
   luajit:
-    runs-on: ubuntu-24.04
+    runs-on: self-hosted
     strategy:
       fail-fast: false
       matrix:
         sanitizer: [address, undefined]
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/setup
+        if: runner.environment == 'github-hosted'
       - name: Build fuzzing tests (${{ matrix.sanitizer }})
         id: build
         uses: google/clusterfuzzlite/actions/build_fuzzers@main