Add mysql2 dialect to support MySQL v8 auth

[derrickmehaffy]

Requires this PR to be merged first: #12557

Add's a hybrid dialect (based on mysql client) to support the mysql2 dialect which is needed for the new auth system introduced in MySQL 8 without using native passwords

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I do not plan to add these as choices for users to pick from when creating new projects as these should be considered unstable. If all goes well in testing maybe in Strapi v5 we can depreciate the mysql client and dialect and only use mysql2 but we will need to validate this with MariaDB

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To-Do:

• add tests

[codecov]

Codecov Report

Merging #12558 (1cb6460) into master (81934f5) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master   #12558      +/-   ##
==========================================
- Coverage   47.59%   47.58%   -0.01%     
==========================================
  Files         210      210              
  Lines        8192     8193       +1     
  Branches     1857     1858       +1     
==========================================
  Hits         3899     3899              
- Misses       3531     3532       +1     
  Partials      762      762              

Flag	Coverage Δ
front	?
unit	47.58% <0.00%> (-0.01%)	⬇️

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Impacted Files	Coverage Δ
packages/core/database/lib/dialects/index.js	16.66% <0.00%> (-0.99%)	⬇️

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[derrickmehaffy]

Closing and merging this into #12557