Make mlflow not thread safe by reopening the same run before each node

[Galileo-Galilei]

… to ensure all the tracking is done within the same run (#623, #624)

Description

Close #623, #624

Development notes

Checklist

• Read the contributing guidelines
• Open this PR as a 'Draft Pull Request' if it is work-in-progress
• Update the documentation to reflect the code changes
• Add a description of this change and add your name to the list of supporting contributions in the CHANGELOG.md file. Please respect Keep a Changelog guidelines.
• Add tests to cover your changes

Notice

• I acknowledge and agree that, by checking this box and clicking "Submit Pull Request":

• I submit this contribution under the Apache 2.0 license and represent that I am entitled to do so on behalf of myself, my employer, or relevant third parties, as applicable.

• I certify that (a) this contribution is my original creation and / or (b) to the extent it is not my original creation, I am authorised to submit this contribution on behalf of the original creator(s) or their licensees.

• I certify that the use of this contribution as authorised by the Apache 2.0 license does not violate the intellectual property rights of anyone else.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 84.61538% with 2 lines in your changes missing coverage. Please review.

Project coverage is 99.43%. Comparing base (023049b) to head (cf1acc9).
Report is 22 commits behind head on master.

Files with missing lines	Patch %	Lines
kedro_mlflow/framework/hooks/mlflow_hook.py	84.61%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #638      +/-   ##
==========================================
- Coverage   99.90%   99.43%   -0.48%     
==========================================
  Files          30       28       -2     
  Lines        1054     1062       +8     
==========================================
+ Hits         1053     1056       +3     
- Misses          1        6       +5     

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