remove version check that are always true

[MoadElfatihi]

Hello,

This change is about removing some unecessary checks for :

• MySql : the minimum version is already 8
• Oracle : the minimum version is 19 (so better to set argument to true, I did not change the signature of jsonObject_oracle method as it is used by the OracleLegacyDialect)

Thanks team
Moad ELFATIHI

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[gavinking]

Looks good.