feat: add tinytext, mediumtext and longtext data types

[CookiePieWw]

I hereby agree to the terms of the GreptimeDB CLA.

Refer to a related PR or issue link (optional)

close #3703

What's changed and what's your intention?

Add TINYTEXT, MEDIUMTEXT and LONGTEXT as alias of TEXT for compatibility with MYSQL.

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR does not require documentation updates.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.15%. Comparing base (7e56bf2) to head (f3c80af).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3731      +/-   ##
==========================================
- Coverage   85.42%   85.15%   -0.27%     
==========================================
  Files         966      966              
  Lines      162097   162116      +19     
==========================================
- Hits       138472   138052     -420     
- Misses      23625    24064     +439     

[tisonkun]

LGTM. Verified locally also:

mysql> CREATE TABLE t(ts TIMESTAMP TIME INDEX, payload MEDIUMTEXT);
Query OK, 0 rows affected (0.02 sec)

mysql> DESC t;
+---------+----------------------+------+------+---------+---------------+
| Column  | Type                 | Key  | Null | Default | Semantic Type |
+---------+----------------------+------+------+---------+---------------+
| ts      | TimestampMillisecond | PRI  | NO   |         | TIMESTAMP     |
| payload | String               |      | YES  |         | FIELD         |
+---------+----------------------+------+------+---------+---------------+
2 rows in set (0.01 sec)

[killme2008]

LGTM

[tisonkun]

Thanks for your contribution @CookiePieWw! This patch is clean and correct :D