Update FDB versions used for the e2e PR tests (#2365)

Author: johscheuer

e2e/Makefile

@@ -10,9 +10,9 @@ TIMEOUT?=168h
 CLUSTER_NAME?=
 NAMESPACE?=
 CONTEXT?=
-FDB_VERSION?=7.1.57
+FDB_VERSION?=7.3.69
 # This will be the version used for upgrade tests.
-NEXT_FDB_VERSION?=7.3.59
+NEXT_FDB_VERSION?=7.4.5
 ## Expectation is that you are running standard build image which generates both regular and debug (Symbols) images.
 FDB_IMAGE?=foundationdb/foundationdb
 UNIFIED_FDB_IMAGE?=foundationdb/fdb-kubernetes-monitor