[TM-190] Use RecFromTuple in entrypoint-wise upgradeable contracts

Description

We used Rec as a parameter to mkEpwContract. It is not convenient since:

1. we need to import vinyl
2. we can't set 0 precedence for (/==>) operator.

This MR adds mkEpwContractT that accepts a tuple of clauses instead of Rec.

Related issue(s)

https://issues.serokell.io/issue/TM-190

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