Swap out legacycrypt for crypt-r for Python 3.13+

PR Azure#3070 pulled in legacycrypt to replace the removed crypt module.
legacycrypt hasn't been updated since it was initially pulled out of
Python's stdlib in 2019 (Python 3.7). crypt-r pulls in the module as it
was in Python 3.12. While there's been no major developments since 3.7,
it's more likely to be kept updated for any breakages in future Python
releases.

It's also already packaged for Fedora and means one less package for me
to maintain so that would be nice.

azurelinuxagent/common/osutil/default.py

@@ -38,13 +38,13 @@
 from pwd import getpwall
 
 from azurelinuxagent.common.exception import OSUtilError
-# 'crypt' was removed in Python 3.13; use legacycrypt instead
+# 'crypt' was removed in Python 3.13; use crypt-r instead
 if sys.version_info[0] == 3 and sys.version_info[1] >= 13 or sys.version_info[0] > 3:
     try:
-        from legacycrypt import crypt
+        from crypt_r import crypt
     except ImportError:
         def crypt(password, salt):
-            raise OSUtilError("Please install the legacycrypt Python module to use this feature.")
+            raise OSUtilError("Please install the crypt-r Python module to use this feature.")
 else:
     from crypt import crypt  # pylint: disable=deprecated-module
 

requirements.txt

@@ -1,3 +1,3 @@
 distro; python_version >= '3.8'
 pyasn1
-legacycrypt; python_version >= '3.13'
+crypt-r; python_version >= '3.13'

setup.py

@@ -318,11 +318,11 @@ def run(self):
 #   module was deprecated. Depending on the Linux distribution the
 #   implementation may be broken prior to Python 3.8 where the functionality
 #   will be removed from Python 3.
-# * In version 3.13 of Python, the crypt module was removed and legacycrypt is
+# * In version 3.13 of Python, the crypt module was removed and crypt-r is
 #   required instead.
 requires = [
     "distro;python_version>='3.8'",
-    "legacycrypt;python_version>='3.13'",
+    "crypt-r;python_version>='3.13'",
 ]
 
 modules = []  # pylint: disable=invalid-name