dolthub/dolt#9481 - Fix FLOAT/DOUBLE auto_increment test expectations

- Unskip float and double auto_increment tests
- Update test expectations to match MySQL 8.0.42 behavior
- FLOAT and DOUBLE are allowed with AUTO_INCREMENT in MySQL
- Fix collation expectations in SHOW CREATE TABLE tests
- All tests now pass confirming GMS matches MySQL behavior

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: elianddb

enginetest/queries/script_queries.go

@@ -10060,28 +10060,34 @@ where
 
 	// Float Tests
 	{
-		Skip:        true,
 		Name:        "float with auto_increment",
 		Dialect:     "mysql",
 		SetUpScript: []string{},
 		Assertions: []ScriptTestAssertion{
 			{
-				Query:          "create table bad (f float primary key auto_increment);",
-				ExpectedErrStr: "Incorrect column specifier for column 'f'",
+				Query:    "create table float_tbl (f float primary key auto_increment);",
+				Expected: []sql.Row{{types.OkResult{}}},
+			},
+			{
+				Query:    "show create table float_tbl;",
+				Expected: []sql.Row{{"float_tbl", "CREATE TABLE `float_tbl` (\n  `f` float NOT NULL AUTO_INCREMENT,\n  PRIMARY KEY (`f`)\n) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_bin"}},
 			},
 		},
 	},
 
 	// Double Tests
 	{
-		Skip:        true,
 		Name:        "double with auto_increment",
 		Dialect:     "mysql",
 		SetUpScript: []string{},
 		Assertions: []ScriptTestAssertion{
 			{
-				Query:          "create table bad (d double primary key auto_increment);",
-				ExpectedErrStr: "Incorrect column specifier for column 'vc'",
+				Query:    "create table double_tbl (d double primary key auto_increment);",
+				Expected: []sql.Row{{types.OkResult{}}},
+			},
+			{
+				Query:    "show create table double_tbl;",
+				Expected: []sql.Row{{"double_tbl", "CREATE TABLE `double_tbl` (\n  `d` double NOT NULL AUTO_INCREMENT,\n  PRIMARY KEY (`d`)\n) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_bin"}},
 			},
 		},
 	},