chore(python): fix prerelease session [autoapprove] (#1504)

* chore(python): fix prerelease session

* remove samples tests

* revert

synthtool/gcp/templates/python_library/noxfile.py.j2

@@ -348,7 +348,8 @@ def prerelease_deps(session):
 
  # Install all dependencies
  session.install("-e", ".[all, tests, tracing]")
- session.install(*UNIT_TEST_STANDARD_DEPENDENCIES)
+ unit_deps_all = UNIT_TEST_STANDARD_DEPENDENCIES + UNIT_TEST_EXTERNAL_DEPENDENCIES
+ session.install(*unit_deps_all)
  system_deps_all = SYSTEM_TEST_STANDARD_DEPENDENCIES + SYSTEM_TEST_EXTERNAL_DEPENDENCIES + SYSTEM_TEST_EXTRAS
  session.install(*system_deps_all)
 
@@ -373,12 +374,6 @@ def prerelease_deps(session):
 
  session.install(*constraints_deps)
 
- if os.path.exists("samples/snippets/requirements.txt"):
- session.install("-r", "samples/snippets/requirements.txt")
-
- if os.path.exists("samples/snippets/requirements-test.txt"):
- session.install("-r", "samples/snippets/requirements-test.txt")
-
  prerel_deps = [
  "protobuf",
  # dependency of grpc
@@ -415,11 +410,19 @@ def prerelease_deps(session):
  system_test_folder_path = os.path.join("tests", "system")
 
  # Only run system tests if found.
- if os.path.exists(system_test_path) or os.path.exists(system_test_folder_path):
- session.run("py.test", "tests/system")
-
- snippets_test_path = os.path.join("samples", "snippets")
-
- # Only run samples tests if found.
- if os.path.exists(snippets_test_path):
- session.run("py.test", "samples/snippets")
+ if os.path.exists(system_test_path):
+ session.run(
+ "py.test",
+ "--verbose",
+ f"--junitxml=system_{session.python}_sponge_log.xml",
+ system_test_path,
+ *session.posargs,
+ )
+ if os.path.exists(system_test_folder_path):
+ session.run(
+ "py.test",
+ "--verbose",
+ f"--junitxml=system_{session.python}_sponge_log.xml",
+ system_test_folder_path,
+ *session.posargs,
+ )