Revert "Use relative imports for splunk-sdk" #730

Job	Run time
build (ubuntu-latest, 3.7, 8.1)	30s
build (ubuntu-latest, 3.7, 8.2)	33s
build (ubuntu-latest, 3.7, latest)	1m 1s
build (ubuntu-latest, 3.9, 8.1)	7m 33s
build (ubuntu-latest, 3.9, 8.2)	7m 34s
fossa-scan / Run fossa scan on repository	34s
build (ubuntu-latest, 3.9, latest)	11m 13s
build (ubuntu-latest, 3.13, 8.1)	7m 34s
build (ubuntu-latest, 3.13, 8.2)	7m 34s
build (ubuntu-latest, 3.13, latest)	13m 22s
fossa-scan / Fetch fossa results	1m 5s
	58m 33s

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