chore: update go tests to use our hosted trivy-db and trivy-java-db images (#2754)

There are 2 remaining exceptions that I am aware of:
1. The tests under test/blackbox/cve.bats
2. One of the cli tests checking the server attempts download of the databases
from the default url

Signed-off-by: Andrei Aaron <aaaron@luxoft.com>

pkg/cli/server/extensions_test.go

@@ -1070,7 +1070,7 @@ func TestServeSearchEnabled(t *testing.T) {
 	})
 }
 
-func TestServeSearchEnabledCVE(t *testing.T) {
+func TestServeSearchEnabledDefaultCVEDB(t *testing.T) {
 	oldArgs := os.Args
 
 	defer func() { os.Args = oldArgs }()