Only show `main` function or `run_native` in backtrace; not both #11771

Job	Run time
Check wasm32 + wasm-bindgen	3m 4s
android	38s
Format + check + test	5m 48s
cargo-deny aarch64-apple-darwin	40s
cargo-deny aarch64-linux-android	38s
Check Windows	1m 35s
cargo-deny i686-pc-windows-gnu	39s
cargo-deny i686-pc-windows-msvc	39s
cargo-deny i686-unknown-linux-gnu	39s
cargo-deny wasm32-unknown-unknown	39s
cargo-deny x86_64-apple-darwin	39s
cargo-deny x86_64-pc-windows-gnu	39s
cargo-deny x86_64-pc-windows-msvc	40s
cargo-deny x86_64-unknown-linux-gnu	42s
cargo-deny x86_64-unknown-linux-musl	40s
cargo-deny x86_64-unknown-redox	41s
	19m 0s

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