fix: modify name column charset to make it case-sensitive for MySQL

[guqing]

What type of PR is this?

/kind improvement
/area core
/milestone 2.20.x

What this PR does / why we need it:

将 MySQL 的表创建脚本 name 列字符集改为 utf8mb4_bin 以使其对大小写敏感

Fixes #4372

how to test it?
使用 docker 运行 MySQL

# mariadb 同样将镜像改为 mariadb 后执行相同步骤
docker run --name mysql-test -e MYSQL_ROOT_PASSWORD=root -e MYSQL_DATABASE=halo -p 3306:3306 --rm -d mysql:latest

然后执行表创建脚本并手动执行以下两条 SQL 能成功插入

insert into extensions(name,data,version) values('a', 'a', 0)
insert into extensions(name,data,version) values('A', 'A', 0)

Does this PR introduce a user-facing change?

修改 MySQL 表创建脚本 name 列的字符集使其大小写敏感，以保证和其他数据库表现一致

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 57.21%. Comparing base (eff73dc) to head (22c385a).
Report is 20 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #6897      +/-   ##
============================================
+ Coverage     56.99%   57.21%   +0.22%     
- Complexity     3999     4004       +5     
============================================
  Files           714      712       -2     
  Lines         24110    24109       -1     
  Branches       1585     1592       +7     
============================================
+ Hits          13742    13795      +53     
+ Misses         9756     9699      -57     
- Partials        612      615       +3     

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[ruibaby]

/lgtm

[ruibaby]

/lgtm

[f2c-ci-robot]

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