Bug#1053945: seaborn: test failure with pandas 2.1

[Rebecca N. Palmer]

Package: src:seaborn
Version: 0.12.2-1
Control: block 1043240 by -1

seaborn fails its tests with pandas 2.1, currently in experimental.

Logs:
https://ci.debian.net/data/autopkgtest/unstable/amd64/s/seaborn/38997875/log.gz
https://launchpad.net/~rebecca-palmer/+archive/ubuntu/pandas2p1/+build/26770797/+files/buildlog_ubuntu-mantic-amd64.seaborn_0.12.2-1_BUILDING.txt.gz

A common source of failures is new pandas FutureWarnings in tests that 
are set to fail on unexpected warnings.