[alloy] add option to authenticate with github to prevent api limiting

[Dialgatrainer02]

i am setting up a homelab and most if not all of the vm's have alloy installed for gathering logs and metrics. can you add a variables to add authentication with github as when i'm testing. i occasionally get rate limited by github due to it scraping the api too many times. i provision the vm's through terraform so my inventories are small meaning the run once looses its effect

[voidquark]

The scrape is executed only once. If you deploy everything at once, it will run only a single time. However, you can specify a particular version using the alloy_version variable, which will bypass the complete scrape from GitHub.