CI: switch to cppcheck premium 26.9.0 #21050

Job	Run time
build_make (ubuntu:25.10)	5m 46s
build_make (alpine:3.23)	5m 7s
build_make (ubuntu:24.04)	2m 52s
build_cmake (ubuntu:25.10, true, true)	3m 14s
build_cmake (alpine:3.23, false, false)	4m 57s
build_cmake (ubuntu:24.04, true, true)	2m 39s
	24m 35s

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