modify github action (#3055)

Summary:
Pull Request resolved: #3055

# context
* build dynamic embedding wheels is only needed for torchrec/contrib which rarely changes, so make this workflow run conditionally.
* add python 3.13 unit test jobs since we now support python 3.13

Reviewed By: aliafzal

Differential Revision: D76182131

fbshipit-source-id: f73d266749dce41ccbec2132d0a791631326423f

Author: TroyGarden

.github/workflows/build_dynamic_embedding_wheels.yml

@@ -3,6 +3,8 @@ name: Build Dynamic Embedding Wheels
 on:
   workflow_dispatch:
   pull_request:
+    paths:
+      - "contrib/*"
     branches:
       - main
   push:

.github/workflows/unittest_ci.yml

@@ -69,6 +69,18 @@ jobs:
             python-version: '3.12'
             python-tag: "py312"
             cuda-tag: "cu128"
+          - os: linux.g5.12xlarge.nvidia.gpu
+            python-version: '3.13'
+            python-tag: "py313"
+            cuda-tag: "cu118"
+          - os: linux.g5.12xlarge.nvidia.gpu
+            python-version: '3.13'
+            python-tag: "py313"
+            cuda-tag: "cu126"
+          - os: linux.g5.12xlarge.nvidia.gpu
+            python-version: '3.13'
+            python-tag: "py313"
+            cuda-tag: "cu128"
     uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main
     permissions:
       id-token: write

.github/workflows/unittest_ci_cpu.yml

@@ -35,6 +35,9 @@ jobs:
             - os: linux.2xlarge
               python-version: '3.12'
               python-tag: "py312"
+            - os: linux.2xlarge
+              python-version: '3.13'
+              python-tag: "py313"
     uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main
     permissions:
       id-token: write