[ci] More workers for WC tests (#3701)

### Changes

Parallel tests on 6 workers to run all tests to complete in around 30
minutes.
Fill missed durations 

### Reason for changes

Speed up job 

### Tests

https://github.com/openvinotoolkit/nncf/actions/runs/18853306010

Author: AlexanderDokuchaev

.github/workflows/conformance_weight_compression.yml

@@ -14,13 +14,13 @@ on:
 
 jobs:
   examples-cpu:
-    name: Weight compression [${{ matrix.group }}/4]
+    name: Weight compression [${{ matrix.group }}/6]
     runs-on: ubuntu-latest-16-cores
     timeout-minutes: 60
     strategy:
       fail-fast: false
       matrix:
-        group: [1, 2, 3, 4]
+        group: [1, 2, 3, 4, 5, 6]
     defaults:
       run:
         shell: bash
@@ -50,7 +50,7 @@ jobs:
             --junit-xml=pytest-results.xml \
             --durations-path=tests/post_training/data/wc_test_durations.json \
             --splitting-algorithm=least_duration \
-            --splits 4 \
+            --splits 6 \
             --group ${{ matrix.group }} \
             ${{ github.event.inputs.pytest_args || '' }}
           ret=$?

tests/post_training/data/wc_test_durations.json

@@ -1,20 +1,32 @@
 {
     "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_awq_backup_mode_none_backend_OV]": 249,
+    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_aware_awq_scale_estimation_backend_ONNX]": 725,
     "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_aware_awq_scale_estimation_backend_OV]": 368,
     "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_aware_awq_scale_estimation_stateful_backend_OV]": 371,
     "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_aware_awq_stateful_backend_OV]": 205,
+    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_aware_backend_FX_TORCH]": 368,
+    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_aware_backend_ONNX]": 213,
     "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_aware_backend_OV]": 206,
+    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_aware_backend_TORCH]": 206,
     "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_aware_gptq_scale_estimation_stateful_backend_OV]": 1161,
     "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_aware_lora_stateful_backend_OV]": 473,
+    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_free_awq_backend_FX_TORCH]": 352,
+    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_free_awq_backend_ONNX]": 154,
+    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_free_awq_backend_OV]": 164,
+    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_free_awq_backend_TORCH]": 210,
     "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_free_backend_FP32]": 0,
+    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_free_backend_ONNX]": 182,
     "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_free_backend_OV]": 187,
+    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_free_opset19_backend_ONNX]": 512,
+    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_int4_data_free_backend_FX_TORCH]": 274,
     "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_int4_data_free_backend_TORCH]": 123,
+    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_int8_data_free_backend_FX_TORCH]": 276,
     "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_int8_data_free_backend_TORCH]": 165,
     "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_NF4_scale_estimation_stateful_per_channel_backend_OV]": 193,
+    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_scale_estimation_per_channel_backend_FX_TORCH]": 423,
+    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_scale_estimation_per_channel_backend_ONNX]": 518,
     "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_scale_estimation_per_channel_backend_OV]": 251,
-    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_free_awq_backend_OV]": 164,
-    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_free_awq_backend_TORCH]": 210,
-    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_free_backend_ONNX]": 182,
-    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_free_opset19_backend_ONNX]": 512,
-    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_data_free_awq_backend_ONNX]": 154
+    "tests/post_training/test_quantize_conformance.py::test_weight_compression[tinyllama_scale_estimation_per_channel_backend_TORCH]": 274,
+    "tests/post_training/test_weight_compression[tinyllama_data_aware_awq_scale_estimation_backend_FX_TORCH]": 472,
+    "tests/post_training/test_weight_compression[tinyllama_data_aware_awq_scale_estimation_backend_TORCH]": 352
 }