python-common: add a utils function to replace distutils.util.strtobool

As distutils is removed from python 3.12 ceph can no longer use the
simple conversion function once located in that module. Add our own
trivial replacement function.

Signed-off-by: John Mulligan <[email protected]>

Author: phlogistonjohn

src/python-common/ceph/utils.py

@@ -167,3 +167,18 @@ def http_req(hostname: str = '',
         log.error(e)
         # handle error here if needed
         raise
+
+
+_TRUE_VALS = {'y', 'yes', 't', 'true', 'on', '1'}
+_FALSE_VALS = {'n', 'no', 'f', 'false', 'off', '0'}
+
+
+def strtobool(value: str) -> bool:
+    """Convert a string to a boolean value.
+    Based on a simlilar function once available at distutils.util.strtobool.
+    """
+    if value.lower() in _TRUE_VALS:
+        return True
+    if value.lower() in _FALSE_VALS:
+        return False
+    raise ValueError(f'invalid truth value {value!r}')