Build

remove obsolete `t_building` #9958

Job	Run time
check-pr	1s
docs / Build linux64	1m 10s
lint / lint	16s
package / Linux / Build linux64	2m 31s
package / Windows / Build win64	10m 55s
test / Windows MSVC / Build win64	6m 26s
test / Linux gcc-10 / Build linux64	1m 49s
test / Linux gcc-12 / Build linux64	2m 36s
test / Run Linux test suite / Test (ubuntu, gcc-10, default plugins, default config)	52s
test / Run Linux test suite (gcc-12, all plugins) / Test (ubuntu, gcc-12, all plugins, default config)	38s
test / Run Windows test suite / Test (windows, msvc, default plugins, default config)	56s
test / Run Windows test suite (empty config) / Test (windows, msvc, default plugins, empty config)	46s
	28m 56s

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