Remove CSV import simulation test - will be replaced with proper dolt bats test

The 'charset validation CSV import simulation' test was just using INSERT
statements with UNHEX - not actually testing CSV import functionality.

A proper CSV import test should:
- Create real CSV files with invalid UTF-8 data
- Use dolt's actual CSV import commands
- Live in the dolt repo as a bats test

This will be implemented in a separate PR branch in the dolt repo.

Author: elianddb

enginetest/queries/script_queries.go

@@ -7232,74 +7232,6 @@ where
 			},
 		},
 	},
-	{
-		Name: "charset validation CSV import simulation",
-		SetUpScript: []string{
-			"create table csv_import_test (id int, name text character set utf8mb4);",
-		},
-		Assertions: []ScriptTestAssertion{
-			{
-				Query:    "set sql_mode = 'STRICT_TRANS_TABLES';",
-				Expected: []sql.Row{{types.OkResult{RowsAffected: 0}}},
-			},
-			{
-				Query:    "insert into csv_import_test values (1, UNHEX('56616C6964205554463820C2AE'));",
-				Expected: []sql.Row{{types.OkResult{RowsAffected: 1}}},
-			},
-			{
-				Query:          "insert into csv_import_test values (2, UNHEX('496E76616C6964205554463820AE'));",
-				ExpectedErrStr: "Incorrect string value: '\\xAE' for column 'name' at row 1",
-			},
-			{
-				Query:          "insert into csv_import_test values (3, UNHEX('416E6F7468657220496E76616C696420FFFE'));",
-				ExpectedErrStr: "Incorrect string value: '\\xFF\\xFE' for column 'name' at row 1",
-			},
-			{
-				Query:    "set sql_mode = '';",
-				Expected: []sql.Row{{types.OkResult{RowsAffected: 0}}},
-			},
-			{
-				Query:    "insert into csv_import_test values (2, UNHEX('496E76616C6964205554463820AE'));",
-				Expected: []sql.Row{{types.OkResult{RowsAffected: 1}}},
-			},
-			{
-				Query:    "insert into csv_import_test values (3, UNHEX('416E6F7468657220496E76616C696420FFFE'));",
-				Expected: []sql.Row{{types.OkResult{RowsAffected: 1}}},
-			},
-			{
-				Query:    "insert into csv_import_test values (4, UNHEX('4E6F726D616C2054657874'));",
-				Expected: []sql.Row{{types.OkResult{RowsAffected: 1}}},
-			},
-			{
-				Query: "select id, name, HEX(name), LENGTH(name) from csv_import_test order by id;",
-				Expected: []sql.Row{
-					{1, "Valid UTF8 ®", "56616C6964205554463820C2AE", 13},
-					{2, "Invalid UTF8 ", "496E76616C6964205554463820", 13},
-					{3, "Another Invalid ", "416E6F7468657220496E76616C696420", 16},
-					{4, "Normal Text", "4E6F726D616C2054657874", 11},
-				},
-			},
-			{
-				Query: "select id, name from csv_import_test where name like '%®%';",
-				Expected: []sql.Row{
-					{1, "Valid UTF8 ®"},
-				},
-			},
-			{
-				Query: "select id, name from csv_import_test where name like '%UTF8%';",
-				Expected: []sql.Row{
-					{1, "Valid UTF8 ®"},
-					{2, "Invalid UTF8 "},
-				},
-			},
-			{
-				Query: "select count(*) as total_queryable from csv_import_test;",
-				Expected: []sql.Row{
-					{4},
-				},
-			},
-		},
-	},
 	{
 		Name: "charset validation issue #8893 - customer scenario",
 		SetUpScript: []string{

sql/types/strings.go

@@ -59,10 +59,10 @@ const (
 
 var (
 	// ErrLengthTooLarge is thrown when a string's length is too large given the other parameters.
-	ErrLengthTooLarge       = errors.NewKind("length is %v but max allowed is %v")
-	ErrLengthBeyondLimit    = errors.NewKind("string '%v' is too large for column '%v'")
-	ErrBinaryCollation      = errors.NewKind("binary types must have the binary collation: %v")
-	ErrBadCharsetString = errors.NewKind("Incorrect string value: '%v' for column '%s' at row %d")
+	ErrLengthTooLarge    = errors.NewKind("length is %v but max allowed is %v")
+	ErrLengthBeyondLimit = errors.NewKind("string '%v' is too large for column '%v'")
+	ErrBinaryCollation   = errors.NewKind("binary types must have the binary collation: %v")
+	ErrBadCharsetString  = errors.NewKind("Incorrect string value: '%v' for column '%s' at row %d")
 
 	TinyText   = MustCreateStringWithDefaults(sqltypes.Text, TinyTextBlobMax)
 	Text       = MustCreateStringWithDefaults(sqltypes.Text, TextBlobMax)