feat(mqtt): MosquittoContainer: Add version 2.1.2

[f18m]

This PR enables the testcontainer MosquittoContainer (which I contributed to this project a few years ago) to work with version 2.1.2 and higher of Mosquitto.

In particular this PR is fixing an issue where rw mode is now needed for /data partition for Mosquitto version 2.1.1 (released 2026-02-04), which fixed a PUID/PGID issue.
In addition, it contains a fix for Mosquitto warnings generated by the listener directive appearing after protocol directive.

[alexanderankin]

what is the goal here?

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.86%. Comparing base (b12ae13) to head (210719e).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
core/testcontainers/core/container.py	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #978      +/-   ##
==========================================
+ Coverage   78.71%   78.86%   +0.15%     
==========================================
  Files          14       14              
  Lines        1217     1221       +4     
  Branches      142      142              
==========================================
+ Hits          958      963       +5     
+ Misses        218      216       -2     
- Partials       41       42       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[f18m]

hey @alexanderankin ,
sorry I forgot to update the description of the PR, doing now.

[alexanderankin]

ok lets make sure this doesnt cause weirdness with the hardcoded volume name. lets use a uuid or something there

[alexanderankin]

if you can figure out how to mount tmpfs that would be even better

[f18m]

hey @alexanderankin ,
I have added support in the DockerContainer class for tmpfs mounts... WDYT ?