sysext: Add python sysext #1964

Job	Run time
Check if we need to update the SDK	1s
Check if we need to update the SDK	1s
Build an updated SDK container	0s
Build an updated SDK container	0s
Build the OS image / Build Flatcar packages (amd64)	1h 46m 0s
Build the OS image / Build Flatcar packages (amd64)	1h 46m 53s
Build the OS image / Build Flatcar packages (arm64)	1h 51m 29s
Build the OS image / Build Flatcar packages (arm64)	1h 55m 4s
Build the OS image / Run kola tests / Run Kola tests (amd64)	30m 52s
Build the OS image / Run kola tests / Run Kola tests (amd64)	33m 39s
Build the OS image / Run kola tests / Run Kola tests (arm64)	33m 41s
Build the OS image / Run kola tests / Run Kola tests (arm64)	32m 38s
Build the OS image / Run kola tests / Merge TAP reports and post results	22s
Build the OS image / Run kola tests / Merge TAP reports and post results	21s
	9h 31m 1s

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