[CI] Bind build-test CI to NVIDIA as AMD runners are being introduced (#718)

* Update submodule 'tvm' to commit e11521e6936a827efa334588d29571fbb4620107

* Rename build-test job to build-test-nvidia and specify nvidia as a runner label in CI workflow.

* Update CI workflow to specify 'nvidia' as an additional runner label for the format-check job.

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ env:
 
 jobs:
   format-check:
-    runs-on: self-hosted
+    runs-on: [self-hosted, nvidia]
 
     permissions:
       contents: write 
@@ -61,8 +61,8 @@ jobs:
       with:
         commit_message: "lint"
 
-  build-test:
-    runs-on: self-hosted
+  build-test-nvidia:
+    runs-on: [self-hosted, nvidia]
     needs: format-check
     permissions:
       contents: read