[3.12] Use roles :data: and :const: for referencing module variables (GH-129507) (GH-129650)

(cherry picked from commit 078ab828b9a21ed0e683941bd141d5017b5f62d9)

• Doc/library/datetime.rst[diff]
• Doc/library/decimal.rst[diff]
• Doc/library/filecmp.rst[diff]
• Doc/library/importlib.metadata.rst[diff]
• Doc/library/importlib.rst[diff]
• Doc/library/logging.rst[diff]
• Doc/library/select.rst[diff]
• Doc/library/ssl.rst[diff]
• Doc/whatsnew/2.3.rst[diff]
• Doc/whatsnew/2.7.rst[diff]
• Doc/whatsnew/3.12.rst[diff]
• Doc/whatsnew/3.4.rst[diff]
• Misc/NEWS.d/3.11.0a4.rst[diff]