Update perf regression workflow to assume pyproject use in repo HEAD (#401)

Author: nirosys

.github/workflows/performance-regression.yml

@@ -14,8 +14,7 @@ env:
   spec_defaults: '{warmups:100,iterations:100}'
   specs: '{command:read,format:ion_text} {command:write,format:ion_text} {command:read,format:ion_binary} {command:write,format:ion_binary}'
   test_data_id: 'generated-test-data'
-  run_cli: 'python amazon/ionbenchmark/ion_benchmark_cli.py'
-  run_cli_new: 'python src-python/amazon/ionbenchmark/ion_benchmark_cli.py'
+  run_cli: 'python src-python/amazon/ionbenchmark/ion_benchmark_cli.py'
 
 
 jobs:
@@ -104,10 +103,7 @@ jobs:
       # Generates performance results for the previous commit
       - name: Create a virtual environment for baseline
         working-directory: ./baseline
-        run: |
-          pip install -r requirements.txt
-          [ -e "requirements_benchmark.txt" ] && pip install -r requirements_benchmark.txt # include benchmark requirements if they exist.
-          pip install .
+        run: pip install '.[test,benchmarking]'
 
       - name: Run baseline performance benchmark
         id: 'baseline'
@@ -130,7 +126,7 @@ jobs:
         id: 'new'
         working-directory: ./new
         run: |
-          ${{env.run_cli_new}} spec '${{env.specs}}' -d '${{env.spec_defaults}}' \
+          ${{env.run_cli}} spec '${{env.specs}}' -d '${{env.spec_defaults}}' \
               -O '{input_file:"${{steps.download.outputs.download-path}}/${{ matrix.test-data }}.10n"}' \
               -o "$PWD/report.ion" -r '${{env.report_statistics}}'
           echo "::group::Ion Report"
@@ -141,4 +137,4 @@ jobs:
       # Compare results and identify regression
       - name: Detect performance regression
         working-directory: ./new
-        run: ${{env.run_cli_new}} compare --fail ${{steps.baseline.outputs.report}} ${{steps.new.outputs.report}} -c '${{env.compare_statistics}}'
+        run: ${{env.run_cli}} compare --fail ${{steps.baseline.outputs.report}} ${{steps.new.outputs.report}} -c '${{env.compare_statistics}}'