Test case ensuring variable filters apply after the negation

[krishnangovindraj]

Usage and product changes

Adds a test ensuring variables are filtered out only after negations are evaluated. This guards against the case where the variables is filtered out and the negation is evaluated with that variable unbound.

Implementation

Protects against regression of vaticle/typedb#6967

• Adds a test case in get.feature ensuring variables are filtered out only after negations are evaluated.

[typedb-bot]

PR Review Checklist

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Trivial Change

• [x] This change is trivial and does not require a code or architecture review.

Code

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