Remove EKF2 from all builds #32956

Job	Run time
build (base)	3m 5s
build (base)	3m 5s
build (clang)	2m 1s
build (clang)	2m 1s
build-gcc-heli	2m 8s
build-gcc-heli	2m 8s
autotest-heli (sitltest-heli)	11m 32s
autotest-heli (sitltest-heli)	11m 32s
autotest (sitltest-copter-tests1a)	11m 49s
autotest (sitltest-copter-tests1a)	11m 49s
autotest (sitltest-copter-tests1b)	13m 33s
autotest (sitltest-copter-tests1b)	13m 33s
autotest (sitltest-copter-tests1c)	12m 32s
autotest (sitltest-copter-tests1c)	12m 32s
autotest (sitltest-copter-tests1d)	11m 54s
autotest (sitltest-copter-tests1d)	11m 54s
autotest (sitltest-copter-tests1e)	13m 35s
autotest (sitltest-copter-tests1e)	13m 35s
autotest (sitltest-copter-tests2a)	13m 23s
autotest (sitltest-copter-tests2a)	13m 23s
autotest (sitltest-copter-tests2b)	24m 47s
autotest (sitltest-copter-tests2b)	23m 10s
	3h 59m 1s

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