chore: Enable v0 symbol mangling (#2985)

rust-lang/rust#60705
Due to modification of .cargo/config.toml your `cargo build` should pick
this change up automatically. Use `legacy` instead of `v0` if you find
yourself in need of old mangling scheme for whatever reason
Release Notes:

- Improved precision of backtraces in application crashes

Author: osiewicz

.cargo/config.toml

@@ -1,2 +1,6 @@
 [alias]
 xtask = "run --package xtask --"
+
+[build]
+# v0 mangling scheme provides more detailed backtraces around closures
+rustflags = ["-C", "symbol-mangling-version=v0"]