fix(pretty-print): normalize WITH locations and ON TRUE joins in the generic pass

[edjubert]

What

Two normalizations move from a hand-written recursive walk into the generic clear_location pass, which visits every node whatever its parent:

1. WithClause.location is now cleared like the other location fields.
2. The INNER JOIN ... ON TRUE / CROSS JOIN equivalence is applied wherever a JoinExpr appears.

normalize_join_expr and its 80 lines of per-parent recursion are deleted.

Why

normalize_join_expr enumerated the parents it knew how to descend through: SelectStmt, RangeSubselect, ViewStmt, DeleteStmt, SubLink.
Any other parent hid the join from normalization, and the round-trip guard then reported a false difference - the printer spells a CROSS JOIN as INNER JOIN ON TRUE, so the two ASTs must compare equal for the statement to be formattable at all.

CREATE TABLE ... AS SELECT is exactly such a parent.
Both of these statements were refused before this PR and format correctly after it:

CREATE TABLE s.t AS
SELECT a.id, b.label
FROM s.a
	CROSS JOIN s.b;

CREATE TABLE s.t AS
WITH c AS (
	SELECT x.a FROM s.x ORDER BY x.a
)
SELECT c.a FROM c;

Putting both rules in the generic pass removes the class of bug rather than adding CreateTableAsStmt to a list that will be incomplete again next time.

Tests

Two new fixtures with snapshots at widths 80 and 100. normalize_coverage.rs loses the entry for the deleted function.