[TM-259] Update annotation printing

Description

Problem: We explicitly print empty annotations when there are two of them with the same type (basically field or variable) within a single instruction. Such approach increases contract size, which is pretty sad.

Solution: Explicitly print empty annotations only when they are coming along with non-empty annotation of the same type.

Related issue(s)

https://issues.serokell.io/issue/TM-259

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