[3.13] gh-121946: Temporarily switch to llvm-17 in TSan CI again (GH-122466) (GH-122467)

The Ubuntu package for llvm-18 is broken
(cherry picked from commit 8fb88b22b7a932ff16002dd19e904f9cafd59e9f)

Co-authored-by: Sam Gross <colesbury@gmail.com>
1 file changed