builder/improvements to build process

[rjonczy]

Purpose

• Improve build process in general (decrease build time)
• fix DLC

How does the solution address the problem

Split Dockerfile into 2:

• Dockerfile - base Dockerfile for taraxa-node, 2 stage. First stage using taraxa/taraxa-builder image to compile and build taraxa-node project and Second stage is a runtime image for taraxa-node binaries (copied into this image from first stage)
• builder.Dockerfile - used to builder a builder image, image with all dependencies to build taraxa-node

New workflows for building taraxa-builder:

• build-builder-docker-image: triggered for branches: ^builder/*, ^chore/builder-, ^fix/builder-, ^feature/builder-
• release-builder-docker-image: triggered for tags: ^builder-vX.X.X

Changes made

• improvement to build process
• restructure

[taraxadeploy]

prnet cleaned-up successfully