Make all dependencies workspace dependencies (#9333)

## Summary

This PR modifies our `Cargo.toml` files to use workspace dependencies
for _all_ dependencies, rather than the status quo of sporadically
trying to use workspace dependencies for those dependencies that are
used across multiple crates. I find the current situation more confusing
and harder to manage, since we have a mix of workspace and crate-local
dependencies, whereas this setup consistently uses the same approach for
all dependencies.

crates/ruff_python_resolver/Cargo.toml

@@ -17,8 +17,8 @@ license = { workspace = true }
 log = { workspace = true }
 
 [dev-dependencies]
-env_logger = "0.10.1"
-tempfile = "3.8.1"
+env_logger = { workspace = true }
+tempfile = { workspace = true }
 insta = { workspace = true }
 
 [lints]