Incorrect decryption results in BGV for a specific parameter set

[yspolyakov]

See https://openfhe.discourse.group/t/incorrect-result-when-using-bgv-in-the-latest-version-v1-1-4/1123 for a reproducible example

[yspolyakov]

• The example works fine in v1.1.1, but stops working correctly starting with v1.1.2.
• The problem occurs only for FIXEDMANUAL and FIXEDAUTO. It works fine for FLEXIBLEAUTO* modes.