feat(docker): Add support for arm64 and amd64 builds for jemalloc

[muXxer]

Description of change

There was a hardcoded path in the LD_PRELOAD environment variable for x86_64-linux-gnu architecture, which makes no sense for arm64. This PR installs libjemalloc on arm64 and amd64 plattforms and correctly symlinks the library to a static path, which then is used in the LD_PRELOAD env var. On other architectures we panic the docker build now.

Type of change

• Enhancement (a non-breaking change which adds functionality)

How the change has been tested

I created a PoC dockerfile and checked the env vars after the build.

Change checklist

• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have checked that new and existing unit tests pass locally with my changes