Remove hardcoded build arguments

[leet4tari]

For cross-building environments, we hardcoded some build arguments. Would be better if we support passing the build arguments at build time and removed the hardcode arguments.

[leet4tari]

Taking an idea from a project like openssl-sys, we could prefix the build arguments with lets say RANDOMXRS_, then we could strip the prefix passing all envs to cmake before build.

[humb1t]

I think I may found an issue related to that:

9.034 error: failed to run custom build command for `randomx-rs v1.3.1`
9.034
9.034 Caused by:
9.034   process didn't exit successfully: `/.../target/release/build/randomx-rs-6e57928aa930594d/build-script-build` (exit status: 101)
9.034   --- stdout
9.034   status: exit status: 1
9.034   -- The CXX compiler identification is unknown
9.034   -- Configuring incomplete, errors occurred!
9.034   See also "/.../target/release/build/randomx-rs-2b4fae279d6cdf45/out/randomx_build/CMakeFiles/CMakeOutput.log".
9.034   See also "/.../target/release/build/randomx-rs-2b4fae279d6cdf45/out/randomx_build/CMakeFiles/CMakeError.log".
9.034
9.034   --- stderr
9.034   CMake Error at CMakeLists.txt:31 (project):
9.034     The CMAKE_CXX_COMPILER:
9.034
9.034       /usr/bin/aarch64-linux-gnu-g++
9.034
9.034     is not a full path to an existing compiler tool.
9.034
9.034     Tell CMake where to find the compiler by setting either the environment
9.034     variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
9.034     to the compiler, or to the compiler name if it is in the PATH.
9.034
9.034
9.034   thread 'main' panicked at /usr/local/cargo/registry/src/index.crates.io-6f17d22bba15001f/randomx-rs-1.3.1/build.rs:97:9:
9.034   assertion failed: c.status.success()
9.034   note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
9.034 warning: build failed, waiting for other jobs to finish...

[humb1t]

Builds in docker on x86_64 work fine.

[leet4tari]

Was the build arch the same as the target arch? If not, that is where I have run into problems, but my rust is very poor and don't really know how to fix.