Improve support for MySQL data types

[hasathcharu]

Purpose

This pull request adds improved support to MySQL data types when introspecting an existing database. Changes required for tooling in annotations changed in #6180 are also included.

Fixes: #6180

Examples

Checklist

• Linked to an issue
• Updated the specification
• Updated the changelog
• Added tests

[codecov]

Codecov Report

Attention: Patch coverage is 89.65517% with 18 lines in your changes are missing coverage. Please review.

Project coverage is 84.16%. Comparing base (8a0b88d) to head (58eb2e7).

Files	Patch %	Lines
...ist/nodegenerator/syntax/utils/BalSyntaxUtils.java	79.51%	5 Missing and 12 partials ⚠️
...main/java/io/ballerina/persist/models/SQLType.java	93.75%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #334      +/-   ##
==========================================
+ Coverage   83.75%   84.16%   +0.41%     
==========================================
  Files          63       63              
  Lines        5577     5659      +82     
  Branches      712      739      +27     
==========================================
+ Hits         4671     4763      +92     
+ Misses        681      667      -14     
- Partials      225      229       +4     

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[sonarqubecloud]

Quality Gate failed

Failed conditions
7.2% Duplication on New Code (required ≤ 3%)

See analysis details on SonarCloud