Add support for sanitizing (filtering) style properties

[xmo-odoo]

Matches what I understand of Bleach's CSSSanitizer: CSS properties are filtered by name and global.

A few notes:

• Although CSS sanitization is not enabled by default (since rework how bleach.clean sanitizes css mozilla/bleach#633), Bleach provides a default set of properties, maybe this should do the same?
• Much like bleach, when filtering is enabled the declarations will be "normalised" even if accepted as part of processing the declarations-list, for the most part this consists of removing malformed declarations as well as constructs which currently make no sense at the declaration level (e.g. at-rules are allowed by the grammar but there is currently no valid declaration-level at-rule, so they will be stripped).
• Technically Bleach provides a more flexibility since rework how bleach.clean sanitizes css mozilla/bleach#633 as CSS sanitizers work off of a protocol. I'm not sure how useful this is (are there examples of people leveraging it?) so this initial version does not support it, but I think that could be added (even later on) by storing a Box<dyn CSSSanitizer>, implementing CSSSanitizer for HashSet<&str>, and having filter_style_properties take a T: CSSSanitizer and box it?