ADBDEV-8487: Update python library PyGreSql 4 to 5.2.5

[KnightMurloc]

The following points have been fixed:

1. PyGreSQL 5 has added support for converting additional data types.
   Analyzedb: Converting datetime to a string for correct comparison with the value
   saved in the file.
   el8_migrate_localte.py, gparray.py, gpcatalog.py and gpcheckcat: using the Bool
   type instead of comparing with a string.
   gpcheckcat, repair_missing_extraneous.py and unique_index_violation_check:
   using python list instead of string parsing.
2. PyGreSQL 5 added support for closing a connection when using the with
   construct. Because of this, in a number of places, reading from the cursor took
   place after the connection was closed.
3. PyGreSQL 5 does not end the transaction if an error occurs, which leads to a
   possible connection leak if an error occurs in the connect function. So catch
   errors that happen in the connect function.
4. Add closure of the connection saved in context after the scenario in behave
   tests.
5. Add closure to the connection if it does not return from the function.
6. Use the python wrapper for the connect function instead of C one.
7. Use a custom cursor to disable row postprocessing to avoid fixing a large
   amount of code.