fix(t-rules): exclude schemas at table level

[pmpetit]

This pull request refactors the schema exclusion logic in dblinter/scan.py to improve maintainability and consistency. The hardcoded lists of excluded schemas in SQL queries have been replaced with a single constant, EXCLUDED_SCHEMAS_STR, imported from dblinter/function_library. This makes it easier to manage and update excluded schemas in one place.

Refactoring and maintainability improvements:

• Replaced hardcoded excluded schema lists in SQL queries within perform_schema_check and perform_table_check functions with the EXCLUDED_SCHEMAS_STR constant for consistency and easier updates. [1] [2]
• Added import of EXCLUDED_SCHEMAS_STR from dblinter/function_library to dblinter/scan.py.# PR Description

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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