Auto merge of #146394 - Enselic:debuginfo-level-tests-2, r=jieyouxu

ci: Increase `rust.debuginfo-level-tests` to `2` in `x86_64-gnu-debug` job

Simply to increase the scope of the testing.

Part of rust-lang/rust#61117.

cc rust-lang/rust#145967 and rust-lang/rust#146025 which prepared for this. And rust-lang/rust#144499 that set to level to `1`

try-job: x86_64-gnu-debug

Author: bors