[SCSB-225] migrate [tool.pytest.ini_options] to native TOML

Author: zacharyburnett

pyproject.toml

@@ -35,7 +35,7 @@ submission = ["bs4"]
 dev = ["ipython", "jupyterlab", "ansible", "helm"]
 test = [
   "mock",
-  "pytest >= 6.0",
+  "pytest>=9.0",
   "pytest-astropy",
   "pytest-doctestplus>=0.10.0",
   "stsynphot",
@@ -147,7 +147,7 @@ crds = "crds"
   "specs/*.json",
 ]
 
-[tool.pytest.ini_options]
+[tool.pytest]
 python_files = ["test_*"]
 python_classes = ["Test*"]
 python_functions = ["test_*"]