go: upgrade to Go 1.26 and modernize#1340

ggilmore wants to merge 1 commit into

mainsourcegraph/src-cli:mainfrom

go-fix-modernize-lib-270b1737-ed47-45a7-86f7-80feb79e95f9sourcegraph/src-cli:go-fix-modernize-lib-270b1737-ed47-45a7-86f7-80feb79e95f9Copy head branch name to clipboard