Another major version of ruff dropped https://astral.sh/blog/ruff-v0.15.0

Most newly stabilized linting rules have auto-fixes, and I personally think they are all clear improvements. Since we are almost a month away from an auto-upgrade now, I think I'll go with sweeping PRs instead of subpackage targetted ones for a change.

Summary:

❯ ruff check astropy --statistics
72	RUF061 	[ ] legacy-form-pytest-raises
 6	FURB110	[*] if-exp-instead-of-or-operator
 6	PLW0108	[ ] unnecessary-lambda
 2	SIM910 	[*] dict-get-with-none-default
 1	PLC0207	[*] missing-maxsplit-arg
Found 87 errors.
[*] 9 fixable with the `--fix` option (76 hidden fixes can be enabled with the `--unsafe-fixes` option)

Hopefully there's more than enough time to converge on them. I'll link related PRs here.

• TST: fixes for RUF061 (legacy-form-pytest-raises) #19262
• TST: autofixes for FURB110 (if-exp-instead-of-or-operator) #19263
• TST: autofixes for PLW0108 (unnecessary-lambda) #19264
• TST: autofixes for SIM910 (dict-get-with-none-default) #19265
• TST: autofixes for PLC0207 (missing-maxsplit-arg) #19266
• STY: reformat lambda expressions with ruff 0.15 #19271