[performance] bump codeberg.org/gruf/go-kv to v2 (#4341)

updates our codeberg.org/gruf/go-kv log key-value formatting library to latest version, which comes with some maaaaaaajor speed boosts in the form of:
- very minimal reflect.Value{} usage
- caching prepared formatting functions per type

~~still a work-in-progress until i make a release tag on the go-kv repository, which itself is waiting on published benchmark results in the README and finishing writing some code comments~~

benchmarks so far show this to be ~3x faster than the "fmt" stdlib package on average, when run across a wide variety (106 different types) of test cases, while still creating more visually friendly log output and actually recursing down nested struct ptrs

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4341
Co-authored-by: kim <grufwub@gmail.com>
Co-committed-by: kim <grufwub@gmail.com>

go.sum

@@ -32,6 +32,8 @@ codeberg.org/gruf/go-iotools v0.0.0-20240710125620-934ae9c654cf h1:84s/ii8N6lYls
 codeberg.org/gruf/go-iotools v0.0.0-20240710125620-934ae9c654cf/go.mod h1:zZAICsp5rY7+hxnws2V0ePrWxE0Z2Z/KXcN3p/RQCfk=
 codeberg.org/gruf/go-kv v1.6.5 h1:ttPf0NA8F79pDqBttSudPTVCZmGncumeNIxmeM9ztz0=
 codeberg.org/gruf/go-kv v1.6.5/go.mod h1:c4PsGqw05bDScvISpK+d31SiDEpBorweCL50hsiK3dc=
+codeberg.org/gruf/go-kv/v2 v2.0.3 h1:Ge4/WFR417EFPwfDdsf8S80XAdKF74RJk5g+VerAg1k=
+codeberg.org/gruf/go-kv/v2 v2.0.3/go.mod h1:mNL6SrBnYGEyrx6Mh4E1tAdhO0+T9/1iBrPJxIwxY24=
 codeberg.org/gruf/go-list v0.0.0-20240425093752-494db03d641f h1:Ss6Z+vygy+jOGhj96d/GwsYYDd22QmIcH74zM7/nQkw=
 codeberg.org/gruf/go-list v0.0.0-20240425093752-494db03d641f/go.mod h1:F9pl4h34iuVN7kucKam9fLwsItTc+9mmaKt7pNXRd/4=
 codeberg.org/gruf/go-loosy v0.0.0-20231007123304-bb910d1ab5c4 h1:IXwfoU7f2whT6+JKIKskNl/hBlmWmnF1vZd84Eb3cyA=