[Rust]: Optimize Rust steps on CI

[satoshiotomakan]

Is your feature request related to a problem? Please describe.

At this moment, tools/rust-bindgen builds the Rust library for multiple targets even though they are not required.
For example, there is no need to build Rust library for Android on ios-ci workflow:

wallet-core/tools/rust-bindgen

Lines 25 to 27 in 1a214be

	if [[ `uname` == "Darwin" ]]; then
	echo "Generating Android targets"
	cargo build --target aarch64-linux-android --target armv7-linux-androideabi --target x86_64-linux-android --target i686-linux-android --release

Describe the solution you'd like

We can extend the number of possible input arguments for tools/rust-bindgen and tools/install-rust-dependencies with:

• android - install only android toolchains, build Rust lib for android targets only.
• ios - install only iOS toolchains, build Rust lib for iOS targets only.
• wasm - install only WASM toolchain, build Rust lib for WASM target only.
• native - build Rust lib for native target only.
• No arguments - install all possible toolchains, build Rust lib for all targets.

Checklist

• Refactor tools/rust-bindgen and tools/install-rust-dependencies
• Consider using sccache for all pipelines.