Shrink relationComplexityError test size

[jakebailey]

Getting tired of this test timing out on slower builders.

[Copilot]

Pull Request Overview

This PR reduces the size of the relationComplexityError compiler test to prevent timeouts on slower build machines. By reducing the Digits type from 10 literal types ('0'-'9') to 8 literal types ('0'-'7'), the number of type combinations drops from 10,000 to 4,096, significantly improving test performance while still reproducing the relation complexity error from issue #55630.

Key Changes

• Reduced Digits type from 10 literals to 8 literals, decreasing type combinations from 10^4 to 8^4
• Updated all baseline files to reflect the reduced Type Count (from 25,000 to 10,000) and adjusted symbol positions

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
tests/cases/compiler/relationComplexityError.ts	Removed '8' and '9' from the Digits type to reduce test complexity
tests/baselines/reference/relationComplexityError.types	Updated type count from 25,000 to 10,000 and refreshed type baselines
tests/baselines/reference/relationComplexityError.symbols	Updated symbol declaration positions to reflect shorter Digits type definition
tests/baselines/reference/relationComplexityError.errors.txt	Updated error baseline to reflect the reduced Digits type