SQL Expressions: incorrectly collapses escaped quotes ('' to '), breaking valid SQL string literals

### What happened? The SqlDatasource.clean() method in @grafana/plugin-ui incorrectly processes SQL-escaped quotes. It converts double single-quotes ('') into a single quote ('). This transformation corrupts valid SQL strings, leading to syntax errors in the database engine because the resulting string literal is unclosed or malformed. ### What did you expect to happen? SQL-escaped quotes should be preserved exactly as entered. For example, `'a''b'` is a standard SQL representation of the string `a'b` and should remain `'a''b'` after the cleaning process. ### Did this work before? Yes. This issue does not occur in Grafana's core SQL datasources (such as the PostgreSQL datasource), which correctly handle escaped quotes. The problem seems specific to the SqlDatasource.clean() utility in @grafana/plugin-ui. ### How do we reproduce it? 1. Use a SQL data source plugin that utilizes @grafana/plugin-ui (e.g., DuckDB or similar). 2. Execute the following query: ```sql SELECT 'it''s working' ``` 3. Observe the query sent to the backend. It is modified to: ```sql SELECT 'it's working' ``` 4. The database returns a syntax error because the quote after it prematurely closes the string. ``` error querying the database: Parser Error: syntax error at or near "working" LINE 1: SELECT 'it's working' ^ ``` ### Is the bug inside a dashboard panel? It affects all query entry points, including Dashboard panels and Explore. The issue is rooted in the datasource's shared query processing logic (SqlDatasource.clean()), meaning any query containing escaped quotes will fail regardless of where it is executed. ### Environment (with versions)? Plugin: motherduckdb/grafana-duckdb-datasource v0.4.0 Grafana: 11.6.0 @grafana/plugin-ui: 0.9.4 ### Grafana platform? Docker ### Datasource(s)? DuckDB datasource plugin (motherduckdb/grafana-duckdb-datasource) and maybe any other SQL datasource using the shared @grafana/plugin-ui