teuthology: implement strtobool and use it

The distutils module was deprecated in Python 3.10 and removed in
Python 3.12. This commit replaces the deprecated distutils.utils.strtobool
imports with strtobool in teuthology.util module.

Changes:
- Add strtobool.py to teuthology/util
- Replace distutils.util.strtobool with
teuthology.util.strtobool.strtobool

Signed-off-by: Kefu Chai <tchaikov@gmail.com>

Author: tchaikov

teuthology/describe_tests.py

@@ -8,12 +8,11 @@
 import yaml
 
 import random
-from distutils.util import strtobool
-
 from teuthology.exceptions import ParseError
 from teuthology.suite.build_matrix import \
         build_matrix, generate_combinations, _get_matrix
 from teuthology.suite import util, merge
+from teuthology.util.strtobool import strtobool
 
 def main(args):
     try:

teuthology/suite/__init__.py

@@ -7,7 +7,6 @@
 import random
 import sys
 import time
-from distutils.util import strtobool
 
 import teuthology
 from teuthology.config import config, YamlConfig
@@ -16,6 +15,7 @@
 
 from teuthology.suite.run import Run
 from teuthology.suite.util import schedule_fail
+from teuthology.util.strtobool import strtobool
 
 log = logging.getLogger(__name__)
 

teuthology/util/strtobool.py

@@ -0,0 +1,14 @@
+def strtobool(val):
+    """Convert a string representation of truth to true (1) or false (0).
+    
+    True values are 'y', 'yes', 't', 'true', 'on', and '1'; false values
+    are 'n', 'no', 'f', 'false', 'off', and '0'.  Raises ValueError if
+    'val' is anything else.
+    """
+    val = val.lower()
+    if val in ('y', 'yes', 't', 'true', 'on', '1'):
+        return 1
+    elif val in ('n', 'no', 'f', 'false', 'off', '0'):
+        return 0
+    else:
+        raise ValueError(f"invalid truth value {val!r}")