Update QuatDescriptor for typed-descriptor-lazy-default

[taldcroft]

Description

This makes a few changes for compatibility with sot/ska_helpers#54.

Interface impacts

None

Testing

Unit tests

• Mac

(masters) ➜  cxotime git:(cxotime-descr) git rev-parse HEAD                                                             
f0f3d24d17f318c54b483e644ead80142b7439e1
(masters) ➜  cxotime git:(cxotime-descr) pytest
===================================================== test session starts ======================================================
platform darwin -- Python 3.10.8, pytest-7.2.1, pluggy-1.0.0
rootdir: /Users/aldcroft/git, configfile: pytest.ini
plugins: timeout-2.1.0, anyio-3.6.2
collected 235 items                                                                                                            

cxotime/tests/test_cxotime.py .......................................................................................... [ 38%]
........................................................................................................................ [ 89%]
.........................                                                                                                [100%]

===================================================== 235 passed in 2.15s ======================================================

Independent check of unit tests by [REVIEWER NAME]

• [PLATFORM]:

Functional tests

No functional testing.

[javierggt]

Looks good to me.

I ran the tests and verified that a list default fails with the lazy-default descriptor, and the test passes with this branch.