[Trial]Enable LTO for wasm build

[Dengjianping]

Now we only enabled LTO for native build. If someone is interested in this issue, just check this build.rs:
https://github.com/Manta-Network/Manta/blob/manta/runtime/calamari/build.rs

fn main() {
    WasmBuilder::new()
        .with_current_project()
        .export_heap_base()
        .import_memory()
        .append_to_rust_flags("-C opt-level=z")
        .append_to_rust_flags("-C linker-plugin-lto")
        .build()
}

Re-benchmark pallets to see whether the performance is improved.

[ghzlatarev]

@Dengjianping also when building with SRTool ?

[ghzlatarev]

https://github.com/paritytech/substrate/pull/10747/files

paritytech/substrate#10608

[Dengjianping]

https://github.com/paritytech/substrate/pull/10747/files

I feel confused about this pr, why some benchmark go down a little bit.

[Dengjianping]

I tried to enable LTO for wasm build, seems almost identical, some result are even worse.
And you can look at the result in substrate, the same to us.

For now, I don't think it will improve the performance a lot.