fix: Allow passing in a custom wait strategy string in MySQL, Cassandra, Kafka and Trino

[SubhadityaMukherjee]

Hey,

Just a small change in adding the ability to pass in a custom wait strategy message for MySQL. The current implementation had '.: ready for connections.: ready for connections.*' as a default regex with no option to change it. This PR moves it into a parameter.
No new functionality has been added so I presume the tests can stay the same.

If you find this useful, I can also go over the other implementations and make a similar change wherever this is a problem.

[SubhadityaMukherjee]

Okay I did a grep and added similar changes in Cassandra, Kafka and trino where it seemed to also need this as input. As before, I didnt change any functionality so I left the tests unchanged.

Thanks :)

I needed to use testcontainers for a project and tried to debug this for a few hours before getting frustrated and just trying to patch the module instead.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.05%. Comparing base (d7953b8) to head (569820e).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #953      +/-   ##
==========================================
- Coverage   78.30%   78.05%   -0.25%     
==========================================
  Files          14       14              
  Lines        1212     1212              
  Branches      141      141              
==========================================
- Hits          949      946       -3     
- Misses        222      226       +4     
+ Partials       41       40       -1     

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