Add simplified metadata structure for all 41 packages containing:
- Package name, version, and release number
- GitHub repository for packages with GitHub releases
- Build configuration for el/8 and el/9 distributions
This metadata enables future automation for version checking and package building across different distributions.
Standardize download commands across all build scripts:
- HashiCorp packages: wget -O → curl -o
- VictoriaMetrics packages: wget -O → curl -o
- Other packages: wget -O → curl -o, wget → curl -O
- Update dependency lists to use curl instead of wget
This change provides consistency across all packages and uses a single download tool.
