[Testing] Update OpenSUSE 15.6 image pin (#1853)

Updated postgresql version pinning to 16 (#1828)

[VERSION 2.51.1] Upgrade go to 1.21.11 (#1814)

Testing Rhel 8 arm 3p Tests (#1803)

fluent-bit: update to fluent bit 3.1.6 (#1779)

Install terraform in test containers (#1757)

Testing: Add TEST_SELECTOR to Kokoro scripts to allow running a subse…

…t of the tests. (#1739)

Testing: Update `IsSUSE` and call to `prepareSLES`. (#1720)

Update VERSION to 2.46.1 (#1590)

GCL fix for new Louhi Automation (#1578)