feat: got host rules (#3327)

lib/datasource/cargo/index.js

lib/datasource/github/index.js

lib/datasource/go/index.js

lib/datasource/hex/index.js

lib/datasource/maven/index.js

lib/datasource/nuget/get.js

lib/datasource/nuget/v2.js

lib/datasource/nuget/v3.js

lib/datasource/pypi/index.js

lib/datasource/rubygems/get.js

lib/datasource/terraform/index.js

lib/util/got/host-rules.js

lib/util/got/index.js

test/datasource/__snapshots__/pypi.spec.js.snap

test/datasource/nuget.spec.js