ALTER TABLE ALTER COLUMN on tables with indexes do not work

[robinjonsson]

Libsql will throw an error if you try to alter a column in a table that has indexes.

CREATE TABLE `t1` (
    `c1` text,
    `c2` text
);
CREATE INDEX `t1_c1_idx` ON `t1` (`c1`);

ALTER TABLE t1 ALTER COLUMN c2 TO c2 TEXT DEFAULT 'test';

Query 1 ERROR at Line 6: : [{"error":"error in adding c2 TEXT DEFAULT 'test' to t1: Only ordinary tables can be altered, not indexes"}]

Tested in version: v0.23.7