Do not attempt to run fts5bigtok.test or fts5merge2.test if FTS5 is not compiled in.

FossilOrigin-Name: f7ed373953c2dea0919a85dfb461dfef512cd5fc

ext/fts5/test/fts5_common.tcl

@@ -16,7 +16,10 @@ if {![info exists testdir]} {
 source $testdir/tester.tcl
 
 ifcapable !fts5 {
-  finish_test
+  proc return_if_no_fts5 {} {
+    finish_test
+    return -code return
+  }
   return
 }
 
@@ -25,12 +28,6 @@ catch {
   reset_db
 }
 
-# If SQLITE_ENABLE_FTS5 is not defined, skip this test.
-ifcapable !fts5 {
-  finish_test
-  return
-}
-
 proc fts5_test_poslist {cmd} {
   set res [list]
   for {set i 0} {$i < [$cmd xInstCount]} {incr i} {