Add script to generate toolchains for new LCG versions
The script fetches the LCG release details from https://lcgpackages.web.cern.ch/lcgpackages/lcg/meta, generates the toolchain files, and create a commit for it.
The script fetches the LCG release details from https://lcgpackages.web.cern.ch/lcgpackages/lcg/meta, generates the toolchain files, and create a commit for it.