feat: DEVOPS-700 scilla pipelines from jenkins to gha

[pavlops]

Migration of pipelines from Jenkins to GHA (based on Zilliqa image pipelines):

• ci-image-test.yml: make tests, replaces Jenkinsfile.
• ci-image-dev.yml: deploys an image for any branch, replaces Jenkins manual pipeline.
• ci-image-release.yml: deploys an image for a release branch or a tag, replaces Jenkins manual pipeline.
• Dockerfile.test for test image (not optimized, keeping the same approach).
• Lint fix on src/base/cpp/config/discover.ml.
• Makefile fix for avoiding the removal of vcpkg_installed/x64-linux-dynamic/lib/libsecp256k1.a and vcpkg_installed/x64-linux-dynamic/lib/libsecp256k1_precomputed.a for the make coveralls.
• Hide in the pipeline the AWS account for the Docker image.

Further recommendations:

• Build of a test base image for tests replacing scilla:429e2f9 in Dockerfile.test.