Fix dbtest issues

[DmiTryAgain]

• Fix fake int/float types
• Add nolint:dupl to namespace files
• Do not generate random bool if the field is false
• Fix dbtest for custom types, add testcase
• Fix stack overflow if the relation dependencies are: A -> B -> A
• Do not generate FKs in WithFake helper
• Fix duplicates of "if" statements
• Support arrays as FKs
• Return a valid error if searchType is incorrect in XML generator
• Fix bugs when generating only entities or disjoint entities with namespaces
• Fix checking time.Time as PK
• Use db pkg alias from db pkg in templates