Fix: Redundant creation of view models during the first evaluation

[izeigerman]

Closes #5331

The original intention was to create an empty table first if the user explicitly specified column types. However, model.annotated can return True for VIEW models as well if its types are known statically. This PR makes sure that the empty table creation only applies to materialized models.

[Copilot]

Pull Request Overview

This PR fixes an issue where view models were incorrectly triggering empty table creation during evaluation. The fix ensures that empty table creation only applies to materialized models when column types are explicitly provided, preventing redundant view model creation.

• Replaced model.annotated check with a more specific condition for materialized models
• Added logic to verify both materialization type and column type availability
• Updated test assertion to check exact call count rather than just call occurrence

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
sqlmesh/core/snapshot/evaluator.py	Added logic to restrict empty table creation to materialized models with known column types
tests/core/test_snapshot_evaluator.py	Updated test assertion to verify exact call count for view creation

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