feat: support PostgreSQL CREATE TABLE AS data population

[minleejae]

Support CREATE TABLE ... AS query WITH DATA and WITH NO DATA, preserving the omitted/true/false distinction in the AST. This lets schema tooling retain whether CTAS should populate rows.

Reuse one data-population grammar production with CREATE MATERIALIZED VIEW, and the existing shared query renderer for CreateTable.toString and the deparser. Tests cover SELECT, TABLE, VALUES, parentheses, CTEs, and set operations.

Validation:

• Full Gradle check passed (Java 17), including grammar ambiguity, unit tests, coverage, formatting, Checkstyle, PMD, and SpotBugs.
• On PostgreSQL 17.11, the same query created two rows WITH DATA and zero rows WITH NO DATA for all three SQL renderings.
• Added AST, mutation, and parse/deparse regression coverage.

Syntax reference: official documentation.

Additional version-boundary validation: the original, toString, and deparser SQL was executed on PostgreSQL 18.6, including the focused behavioral cases. Reviewed the PostgreSQL 18 grammar. Runtime version numbers above identify the tested binaries; this does not claim support for every statement in those DBMS versions.

[manticore-projects]

Thank you!