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Update version refs for 1.43.0

Micah Nagelrequested to merge
cherry-pick-96ee8428 into master

General MR

Summary

Updates version refs to 1.43.0

Closes https://repo1.dso.mil/platform-one/big-bang/bigbang/-/issues/1295

Edited by Micah Nagel

Merge request reports

UNCLASSIFIED - NO CUI