ci: restore runnable pytest configs

Use real CI config names and minimal config aliases so these tests are
collected and built again instead of silently being skipped.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Made-with: Cursor

components/esp_libc/test_apps/newlib/pytest_newlib.py

@@ -10,6 +10,7 @@ from pytest_embedded_idf.utils import idf_parametrize
     'config,target',
     [
         ('default', 'supported_targets'),
+        ('newlib', 'supported_targets'),
         ('options', 'supported_targets'),
         ('single_core_esp32', 'esp32'),
         ('psram_esp32', 'esp32'),