Support Python 3.13 and add fetch APIs (fetchone, fetchmany, fetchall)

[bchoudhary6415]

This pull request introduces support for Python 3.13 and enhances the database interaction functionality by adding support for the following fetch APIs:

• fetchone: Retrieves a single row from the result set.
• fetchmany: Fetches a specified number of rows from the result set.
• fetchall: Retrieves all rows from the result set.

You can follow below example to use fetch APIs

stmt = ibm_db.exec_immediate(conn, "select * from animals")
rows = ibm_db.fetchall(stmt)
print(rows)

stmt1 = ibm_db.exec_immediate(conn, "select * from animals")
nRows = ibm_db.fetchmany(stmt1,2)
print(nRows)

stmt2 = ibm_db.exec_immediate(conn, "select * from animals")
firstRow = ibm_db.fetchone(stmt2)
print(firstRow)

Py_UNICODE - Deprecated since version 3.13, will be removed in version 3.15.
So used wchar_t in place of Py_UNICODE.

Bug Fixes:

• Logging Enhancement: Removed the timestamp from the ibm_db logging part to streamline the logs.
• ibm_db_dbi Bug Fix: Addressed a bug in the ibm_db_dbi module, ensuring proper functionality and stability.
• Logging Improvements: Enhanced the logging functionality within the ibm_db_dbi module to improve traceability and
  debugging.