Adds ktexttemplate as apt package to new_docker_build.sh and builds successfully

qt6-after/qt6-migrated-legatus/tests/test_migration_stubs.cpp

@@ -104,7 +104,7 @@ TEST(MigrationStubs, ComponentMonitorDtcCompiles)
 
 TEST(MigrationStubs, CoreDtcCompiles)
 {
-    using namespace DDS::Core::Interface;
+    using namespace Core::Interface;
     EXPECT_TRUE(true);
 }
 
@@ -113,7 +113,7 @@ TEST(MigrationStubs, CoreDtcCompiles)
 
 TEST(MigrationStubs, DDSCoreDtcCompiles)
 {
-    using namespace DDS::Core::Interface;
+    using namespace Core::Interface;
     EXPECT_TRUE(true);
 }