ci: Only do CI jobs on main repository

I noticed my doanac/meta-qcom-hwe fork was trying to workflows it
doesn't have access to since we use self-hosted runners.

Signed-off-by: Andy Doan <andy@foundries.io>

.github/workflows/build-yocto.yml

@@ -8,6 +8,7 @@ on:
 
 jobs:
   yocto-check-layer:
+    if: github.repository == 'quic-yocto/meta-qcom-hwe'
     runs-on: [self-hosted, x86]
     steps:
       - uses: actions/checkout@v4
@@ -19,6 +20,7 @@ jobs:
           ci/yocto-check-layer.sh
 
   compile:
+    if: github.repository == 'quic-yocto/meta-qcom-hwe'
     strategy:
       fail-fast: true
       matrix:

.github/workflows/nightly-build.yml

@@ -8,6 +8,7 @@ on:
 
 jobs:
   compile:
+    if: github.repository == 'quic-yocto/meta-qcom-hwe'
     strategy:
       fail-fast: true
       matrix:

.github/workflows/repolinter.yml

@@ -9,6 +9,7 @@ on:
 
 jobs:
   repolinter:
+    if: github.repository == 'quic-yocto/meta-qcom-hwe'
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Repo
@@ -27,4 +28,4 @@ jobs:
         if: steps.check_files.outputs.files_exists == 'false'
         uses: todogroup/repolinter-action@v1
         with:
-          config_url: "https://raw.githubusercontent.com/quic/.github/main/repolint.json"
+          config_url: "https://raw.githubusercontent.com/quic/.github/main/repolint.json"