Fix the test TestEditClusterSettings to run with 7.6.0

Error Messagetimeout: unsupported type: values for "/Timeout" do not match: actual 30 int64, required 31 int64Stacktracegoroutine 232 [running]:

runtime/debug.Stack()

	runtime/debug/stack.go:24 +0x72

github.com/couchbase/couchbase-operator/test/e2e/e2eutil.Die(0xc000e56680, {0x6c66ae0, 0xc004712d20})

	github.com/couchbase/couchbase-operator/test/e2e/e2eutil/util.go:1433 +0x36

github.com/couchbase/couchbase-operator/test/e2e/e2eutil.MustPatchAutoFailoverInfo(0xc003001ae8?, 0x55ca17f?, 0x8?, {0x6c94200, 0xc003001ae8}, 0x87e?)

	github.com/couchbase/couchbase-operator/test/e2e/e2eutil/couchbase_util.go:691 +0x6f

github.com/couchbase/couchbase-operator/test/e2e.TestEditClusterSettings(0x0?)

	github.com/couchbase/couchbase-operator/test/e2e/cluster_test.go:140 +0x1009

testing.tRunner(0xc000e56680, 0x5743df8)

	testing/testing.go:1576 +0x217

created by testing.(*T).Run

	testing/testing.go:1629 +0x806