Fix 10 parser tests with various EXPLAIN AST improvements

[kyleconroy]

Changes:

• Add scientific notation for very small float literals (< 1e-10)
• Handle SQL-style doubled quote escapes in identifiers ("hel""lo")
• Add formatBinaryExprForType for Enum type parameters
• Handle sumDistinct and other aggregate functions with DISTINCT
• Add CastExpr handling in explainWithElement for WITH aliases
• Add window frame offset rendering in WindowDefinition

Tests enabled:

• 01914_ubsan_quantile_timing (scientific notation)
• 00471_sql_style_quoting (doubled quote escapes)
• 00267_tuple_array_access_operators_priority (arrays with tuples)
• 00726_length_aliases (function name normalization)
• 00674_has_array_enum (Enum type formatting)
• 00502_string_concat_with_array (arrays with identifiers)
• 02158_interval_length_sum (tuples with negative numbers)
• 00160_decode_xml_component (DISTINCT modifier)
• 01353_topk_enum (CAST in WITH clause)
• 02306_window_move_row_number_fix (window frame offset)

Additional tests now pass due to improvements:

• 00317, 00324, 00511, 00526, 00548, 00566, 00642
• 01259, 01651, 01700, 01717, 02958, 03003, 03747