Fluent version markers

[mkundu1]

This will fix the issue in running tests with some Fluent versions.

[prmukherj]

@mkundu1, if it is not very urgent can we merge this PR after the release? Actually, it might affect the existing tests and we might need to change some markers as well.
Thank you.

[mkundu1]

@mkundu1, if it is not very urgent can we merge this PR after the release? Actually, it might affect the existing tests and we might need to change some markers as well. Thank you.

Yes sure. Note that it won't require changing any existing markers unless some tests are wrongly marked, but there is no urgency to check that before the release.

[codecov-commenter]

Codecov Report

Merging #1225 (5cd7fed) into main (c6e5522) will decrease coverage by 3.95%.
The diff coverage is n/a.

❗ Current head 5cd7fed differs from pull request most recent head 7bdcfb5. Consider uploading reports for the commit 7bdcfb5 to get more accurate results

@@            Coverage Diff             @@
##             main    #1225      +/-   ##
==========================================
- Coverage   79.27%   75.31%   -3.96%     
==========================================
  Files          49       49              
  Lines        4641     4639       -2     
==========================================
- Hits         3679     3494     -185     
- Misses        962     1145     +183     

[mkundu1]

https://github.com/pyansys/pyfluent/actions/runs/3906173342/jobs/6674043923

Nightly test run is passed.