chore: [Many APIs] update typescript gapic generator to 4.8.1#6136

sofisl merged 4 commits intomaingoogleapis/google-cloud-node:mainfrom

owl-bot-copy-a7b8561799f3124edf3cgoogleapis/google-cloud-node:owl-bot-copy-a7b8561799f3124edf3cCopy head branch name to clipboard