PYTHON-5808 Fix gevent coverage and auth CI failures

Fix shlex-splitting bug in coverage command that broke multi-word marker
expressions (e.g. 'not default_async and default') when GREEN_FRAMEWORK
is set, by building subprocess args as a list instead of a shell string.

Switch enterprise auth setup to use SASL_HOST_BUILD and PRINCIPAL_BUILD
secrets so GSSAPI and SASL tests connect to a MongoDB 4.4+ server
instead of the legacy 4.2 LDAP test server.

Author: blink1073

.evergreen/scripts/run_tests.py

@@ -4,7 +4,6 @@
 import logging
 import os
 import platform
-import shlex
 import shutil
 import subprocess
 import sys
@@ -205,11 +204,12 @@ def run() -> None:
         TEST_ARGS.extend(f"-o log_cli_level={logging.DEBUG}".split())
 
     if os.environ.get("COVERAGE"):
-        binary = sys.executable.replace(os.sep, "/")
-        cmd = f"{binary} -m coverage run -m pytest {' '.join(TEST_ARGS)} {' '.join(sys.argv[1:])}"
-        result = subprocess.run(shlex.split(cmd), check=False)  # noqa: S603
-        cmd = f"{binary} -m coverage report"
-        subprocess.run(shlex.split(cmd), check=False)  # noqa: S603
+        binary = sys.executable
+        result = subprocess.run(  # noqa: S603
+            [binary, "-m", "coverage", "run", "-m", "pytest", *TEST_ARGS, *sys.argv[1:]],
+            check=False,
+        )
+        subprocess.run([binary, "-m", "coverage", "report"], check=False)  # noqa: S603
         if result.returncode != 0:
             print(result.stderr)
         sys.exit(result.returncode)

.evergreen/scripts/setup_tests.py

@@ -263,16 +263,17 @@ def handle_test_env() -> None:
             keytab_file = ROOT / ".evergreen/drivers.keytab"
             with keytab_file.open("wb") as fid:
                 fid.write(keytab)
-            principal = config["PRINCIPAL"]
+            principal = config["PRINCIPAL_BUILD"]
             LOGGER.info("Running kinit")
             os.environ["KRB5_CONFIG"] = str(krb_conf)
             cmd = f"kinit -k -t {keytab_file} -p {principal}"
             run_command(cmd)
 
         LOGGER.info("Setting GSSAPI variables")
-        write_env("GSSAPI_HOST", config["SASL_HOST"])
+        write_env("GSSAPI_HOST", config["SASL_HOST_BUILD"])
         write_env("GSSAPI_PORT", config["SASL_PORT"])
-        write_env("GSSAPI_PRINCIPAL", config["PRINCIPAL"])
+        write_env("GSSAPI_PRINCIPAL", config["PRINCIPAL_BUILD"])
+        write_env("SASL_HOST", config["SASL_HOST_BUILD"])
 
     if test_name == "doctest":
         UV_ARGS.append("--extra docs")