Dockerfile.centos7-cve-fix: base system Dockerfile.ilogtail-toolchain-linux: install toolchain Dockerfile.ilogtail-build-linux: add dependencies

Dockerfile_build: build iLogtail Dockerfile_goc: goc server Dockerfile_development_part: testing entrypoint Dockerfile_production: production entrypoint

Dockerfile_development_part works with the e2e engine. For the usage, we add a ENV named HOST_OS to distinguish host system because the host.docker.internal host cannot be parsed in the docker engine of Linux, more details please see here.