chore: Enable P3M binary R package installation on arm64 platform

[eitsupi]

Close #830

[Copilot]

Pull Request Overview

This PR enables P3M binary R package installation support for arm64 platform by removing architecture-specific source installation requirements and adding arm64 platform support to build configurations.

• Removes forced source compilation for arm64 architecture in R setup script
• Adds linux/arm64 platform support to Docker build configurations
• Updates CI workflows to build and test on arm64 runners

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
scripts/setup_R.sh	Removes arm64-specific source installation logic to enable binary packages
build/templates/bakefiles/main.docker-bake.json	Adds arm64 platform to build template
bakefiles/4.5.1.docker-bake.json	Adds arm64 platform to R 4.5.1 build
bakefiles/4.5.0.docker-bake.json	Adds arm64 platform to R 4.5.0 build
.github/workflows/r-build-test.yml	Updates CI to use arm64 runners and test matrix

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