Update execution engine version in tests to 1.8.0 #8712

Job	Run time
call_is_mergeable / Check if branch is mergeable	4s
build-dev-test (3.11, true)	7m 39s
build-dev-test (3.11, false)	8m 33s
build-dev-test (3.12, false)	8m 52s
build-dev-test (3.12, true)	7m 39s
build-dev-test (3.10, true)	7m 35s
build-dev-test (3.10, false)	8m 31s
	48m 53s

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