chore: rework goreleaser for dockers_v2

[krakenhavoc]

This pull request updates the Docker build and release process to simplify multi-platform image creation and tagging. The changes migrate from the older dockers and docker_manifests configuration to the newer dockers_v2 format in goreleaser.yaml, and adjust the Dockerfile.goreleaser to support multi-platform builds.

Docker build and release process modernization:

• Migrated from the legacy dockers and docker_manifests configuration to the new dockers_v2 format in goreleaser.yaml, enabling simpler multi-platform image builds and unified tagging.
• Updated Docker image tags to include version, major, minor, and latest tags, streamlining how images are referenced and pulled.
• Modified Dockerfile.goreleaser to use the TARGETPLATFORM build argument, ensuring the correct binary is copied for each target platform during multi-architecture builds.