starrocks [BugFix] show create table displays Unicode encoding for default value of the field is entered in Chinese characters

show create table displays Unicode encoding for default value of the field is entered in Chinese characters

Why I'm doing:

What I'm doing:

Fixes #51995

mysql> show create table test111111; +------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Table | Create Table | +------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | test111111 | CREATE TABLE test111111 ( test3 varchar(111) NULL DEFAULT "撒" COMMENT "撒", test1 char(10) NULL DEFAULT "撒" COMMENT "撒", test2 varchar(1) NULL DEFAULT "撒" COMMENT "撒", test4 char(1) NULL DEFAULT "撒" COMMENT "撒", test5 tinyint(4) NULL COMMENT "test1", test6 varchar(1) NULL COMMENT "test2" ) ENGINE=OLAP DUPLICATE KEY(test3) DISTRIBUTED BY HASH(test3) PROPERTIES ( "compression" = "LZ4", "fast_schema_evolution" = "true", "replicated_storage" = "true", "replication_num" = "1" ); | +------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec)

What type of PR is this:

[X] BugFix
[ ] Feature
[ ] Enhancement
[ ] Refactor
[ ] UT
[ ] Doc
[ ] Tool

Does this PR entail a change in behavior?

[ ] Yes, this PR will result in a change in behavior.
[X] No, this PR will not result in a change in behavior.

If yes, please specify the type of change:

[ ] Interface/UI changes: syntax, type conversion, expression evaluation, display information
[ ] Parameter changes: default values, similar parameters but with different default values
[ ] Policy changes: use new policy to replace old one, functionality automatically enabled
[ ] Feature removed
[ ] Miscellaneous: upgrade & downgrade compatibility, etc.

Checklist:

[X] I have added test cases for my bug fix or my new feature
[ ] This pr needs user documentation (for new or modified features or behaviors)
- [ ] I have added documentation for my new feature or new function
[ ] This is a backport pr