[SymForce] Use uv for requirements

[aaron-skydio]

This lets us to an actual full solve for each python version, instead of
the ad-hoc patching we've been doing, which is much more scalable,
especially as parts of the ecosystem start dropping py3.8 and we're
trying to maintain py3.8 through 3.13 and beyond (at least for now?).
Afaik pip-tools isn't capable of doing a solve for python versions other
than what's installed, and uv is nicer anyway. uv also has this new
lockfile
thing they're pushing for, but it's uv-specific so I'd rather not lock us or
users into that.

Last I tried this, uv didn't support solving for python versions other
than the running interpreter; now they do (except that dependencies that
don't have wheels need to get built with an actual Python interpreter).

I previously had a GitHub action to build requirements for all Python
versions; it was super fast (<1m) and kinda convenient, it'd just make a
PR. I think I like just having the requirements test do it now though,
now that it's possible to do that way.

Topic: sf-uv

[aaron-skydio]

Reviews in this chain:
└#392 [SymForce] Use uv for requirements
　└#432 [SymForce] Upgrade requirements
　　└#431 [SymForce] Python 3.13 tests/wheels

[aaron-skydio]

#	head	base	diff	date	summary
0	e044fe84	04ccac19	diff	May 16 23:52 PM	3 files changed, 121 insertions(+), 110 deletions(-)
1	5392e258	04ccac19	diff	Dec 17 21:22 PM	14 files changed, 1555 insertions(+), 71 deletions(-)
2	e4744e49	04ccac19	diff	Dec 17 23:53 PM	1 file changed, 3 insertions(+), 3 deletions(-)
3	1ca9a56b	04ccac19	diff	Dec 18 0:04 AM	1 file changed, 3 insertions(+), 3 deletions(-)
4	1207aa33	da8ea1a8	diff	Mar 7 0:11 AM	11 files changed, 1069 insertions(+), 600 deletions(-)
5	3c2cea15	da8ea1a8	diff	Mar 7 0:14 AM	1 file changed, 3 insertions(+), 3 deletions(-)
6	81f8e08c	ce4c37bc	diff	Mar 17 0:04 AM	10 files changed, 362 insertions(+), 991 deletions(-)
7	b73d4bd9	ce4c37bc	diff	Mar 17 0:10 AM	1 file changed, 3 insertions(+), 3 deletions(-)
8	1a9d031d	ce4c37bc	diff	Mar 17 1:05 AM	4 files changed, 4 insertions(+), 4 deletions(-)
9	cbec7418	ce4c37bc	diff	Mar 17 13:12 PM	1 file changed, 7 insertions(+), 1 deletion(-)
10	b3b318fb	ce4c37bc	diff	Mar 17 15:16 PM	1 file changed, 2 insertions(+)
11	9305080e	ce4c37bc	diff	Mar 17 23:26 PM	1 file changed, 12 insertions(+), 2 deletions(-)
12	dbf5e9a0	ce4c37bc	diff	Mar 18 18:23 PM	7 files changed, 22 insertions(+), 16 deletions(-)
13	9b0152ee	ce4c37bc	diff	Mar 18 19:12 PM	3 files changed, 51 insertions(+), 38 deletions(-)
14	db5b3c60	ce4c37bc	diff	Mar 18 19:43 PM	1 file changed, 4 insertions(+), 4 deletions(-)