Use shared actions (#309)

This PR updates the workflows to use the shared `install-testmo` and
`set-python` actions (and deletes the local versions). At the time of
this writing:
* All four build steps have passed (which use `set-python`)
* One of the four test scripts is underway and looks normal (which used
`install-testmo` at the beginning of the run)

.github/workflows/nm-build.yml

@@ -98,7 +98,7 @@ jobs:
 
             - name: set python
               id: set_python
-              uses: ./.github/actions/nm-set-python/
+              uses: neuralmagic/nm-actions/actions/set-python@main
               with:
                 python: ${{ inputs.python }}
                 venv: ${{ env.VENV_BASE }}

.github/workflows/nm-test.yml

@@ -94,7 +94,7 @@ jobs:
                 nvcc_threads: 0
 
             - name: install testmo
-              uses: ./.github/actions/nm-install-testmo/
+              uses: neuralmagic/nm-actions/actions/install-testmo@main
 
             - name: create testmo run
               id: create_testmo_run
@@ -131,7 +131,7 @@ jobs:
             - name: run buildkite script
               run: |
                 cd tests && sudo bash ../.buildkite/download-images.sh
-            
+
             - name: setenv test skip
               id: setenv_test_skip
               uses: ./.github/actions/nm-set-env-test-skip