Bump to Go 1.26 #9424

Job	Run time
test (windows-latest)	22m 25s
test (concurrent test programs)	14m 20s
extension	38s
test (no submodules)	11m 18s
misc	1m 2s
lint (windows-latest)	11m 9s
lint (ubuntu-latest)	6m 52s
test (race mode)	13m 39s
format	1m 27s
build	4m 6s
test (noembed)	10m 33s
lint (noembed)	6m 55s
generate	13m 22s
test (ubuntu-latest)	14m 17s
tidy	46s
smoke	5m 54s
required	4s
	2h 18m 47s

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