CentOS 7 docker build fails on macos(m2)

Building with the CentOS 7 Docker image (containerized compilation) fails on MacOS(M2) due to missing SCL repositories.

## Reproduction Steps
1. Environment: macOS M2 (arm64 architecture)
2. Execute the containerized build command:
```bash
./auron-build.sh --docker true --pre --sparkver 3.5 --scalaver 2.12
```
Default configuration: Uses the centos7 Docker image for containerized compilation.

## Error Encountered
https://vault.centos.org/centos/7/sclo/aarch64/rh/repodata/repomd.xml: [Errno 14] HTTPS Error 404 - Not Found

## Root Cause
CentOS 7 is EOL, and its SCL repositories (required for devtoolset-11-gcc) have no `aarch64` packages — only `x86_64` exists.