Enable linux-x86_64-conda build via GitHub Actions (facebookresearch#3405)

Summary:
Pull Request resolved: facebookresearch#3405

Migration to GitHub Actions

Reviewed By: junjieqi

Differential Revision: D56843276

fbshipit-source-id: 3d5c7ee9a36a783407dfdcc3574c377da5f9db78

Author: ramilbakhshyiev

.github/workflows/build.yml

@@ -50,3 +50,12 @@ jobs:
       - uses: ./.github/actions/build_cmake
         with:
           opt_level: avx2
+  linux-x86_64-conda:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/[email protected]
+        with:
+          fetch-depth: 0
+          fetch-tags: true
+      - uses: ./.github/actions/build_conda