feat(mysql): Add a test for VECTOR column type

internal/endtoend/testdata/mysql_vector/mysql/query.sql

@@ -0,0 +1,7 @@
+-- name: InsertVector :exec
+INSERT INTO foo(embedding) VALUES (STRING_TO_VECTOR('[0.1, 0.2, 0.3, 0.4]'));
+
+-- name: SelectVector :many
+SELECT id FROM foo
+ORDER BY DISTANCE(STRING_TO_VECTOR('[1.2, 3.4, 5.6]'), embedding, 'L2_squared')
+LIMIT 10;

internal/endtoend/testdata/mysql_vector/mysql/schema.sql

@@ -0,0 +1,4 @@
+CREATE TABLE foo(
+    id INT PRIMARY KEY auto_increment,
+    embedding VECTOR(4)
+);

internal/endtoend/testdata/mysql_vector/mysql/sqlc.json

@@ -0,0 +1,14 @@
+{
+  "version": "1",
+  "packages": [
+    {
+      "path": "go",
+      "sql_package": "database/sql",
+      "sql_driver": "github.com/go-sql-driver/mysql",
+      "engine": "mysql",
+      "name": "querytest",
+      "schema": "schema.sql",
+      "queries": "query.sql"
+    }
+  ]
+}