Add support for extracting Rust set types from frozenset

[messense]

The conversion table is lying currently...

pyo3/guide/src/conversions/tables.md

Line 26 in 07726ae

| `frozenset[T]` | `HashSet<T>`, `BTreeSet<T>`, `hashbrown::HashSet<T>`[^3] | `&PyFrozenSet` |

In [4]: nh3.clean("<b><img src='' onerror='alert(\\'hax\\')'>I'm not trying to XSS you</b>", tags=frozenset())
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[4], line 1
----> 1 nh3.clean("<b><img src='' onerror='alert(\\'hax\\')'>I'm not trying to XSS you</b>", tags=frozenset())

TypeError: argument 'tags': 'frozenset' object cannot be converted to 'PySet'

[codspeed-hq]

CodSpeed Performance Report

Merging #3632 will improve performances by 22.03%

_{Comparing messense:extract-frozen-set (c21a84d) with main (07726ae)}

Summary

⚡ 1 improvements
✅ 77 untouched benchmarks

Benchmarks breakdown

	Benchmark	main	messense:extract-frozen-set	Change
⚡	not_a_list_via_downcast	153.9 ns	126.1 ns	+22.03%

[davidhewitt]

Yep this makes total sense to add 👍