Moves pytest configuration to pyproject.toml (isaac-sim#4376)

# Description

This MR moves pytest configuration to pyproject.toml to avoid many
project infrastructure files.

## Type of change

- Bug fix (non-breaking change which fixes an issue)

## Checklist

- [x] I have read and understood the [contribution
guidelines](https://isaac-sim.github.io/IsaacLab/main/source/refs/contributing.html)
- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [x] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

Author: Mayankm96

pyproject.toml

@@ -168,3 +168,9 @@ skip = '*.usd,*.usda,*.usdz,*.svg,*.png,_isaac_sim*,*.bib,*.css,*/_build'
 quiet-level = 0
 # the world list should always have words in lower case
 ignore-words-list = "haa,slq,collapsable,buss,reacher"
+
+[tool.pytest.ini_options]
+
+markers = [
+    "isaacsim_ci: mark test to run in isaacsim ci",
+]

pytest.ini

@@ -795,17 +795,16 @@ def _create_app(self):
             sys.stdout = open(os.devnull, "w")  # noqa: SIM115
 
         # pytest may have left some things in sys.argv, this will check for some of those
-        # do a mark and sweep to remove any -m pytest and -m isaacsim_ci and -c **/pytest.ini
+        # do a mark and sweep to remove any -m pytest and -m isaacsim_ci and -c **/pyproject.toml
         indexes_to_remove = []
         for idx, arg in enumerate(sys.argv[:-1]):
             if arg == "-m":
                 value_for_dash_m = sys.argv[idx + 1]
                 if "pytest" in value_for_dash_m or "isaacsim_ci" in value_for_dash_m:
                     indexes_to_remove.append(idx)
                     indexes_to_remove.append(idx + 1)
-            if arg == "-c" and "pytest.ini" in sys.argv[idx + 1]:
+            if arg.startswith("--config-file=") and "pyproject.toml" in arg:
                 indexes_to_remove.append(idx)
-                indexes_to_remove.append(idx + 1)
             if arg == "--capture=no":
                 indexes_to_remove.append(idx)
         for idx in sorted(indexes_to_remove, reverse=True):

source/isaaclab/isaaclab/app/app_launcher.py

@@ -151,13 +151,13 @@ def run_individual_tests(test_files, workspace_root, isaacsim_ci):
         )
 
         # Prepare command
+        # Note: Command options matter as they are used for cleanups inside AppLauncher
         cmd = [
             sys.executable,
             "-m",
             "pytest",
             "--no-header",
-            "-c",
-            f"{workspace_root}/pytest.ini",
+            f"--config-file={workspace_root}/pyproject.toml",
             f"--junitxml=tests/test-reports-{str(file_name)}.xml",
             "--tb=short",
         ]