Make skip_ifmodversion_lt skip not installed modules

[bugant]

Pull Request check-list

• Do tests and lints pass with this change?
• Do the CI tests pass with this change (enable it first in your forked repo and wait for the github action build to finish)?
• Is the new or changed code fully tested?
• Is a documentation update included (if this change modifies existing APIs, or introduces new ones)?
• Is there an example added to the examples folder (if applicable)?

Description of change

skip_ifmodversion_lt should not make a test to fail, if the needed module is not enabled. Here the marker is updated to skip the test in that case, instead.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 76.70%. Comparing base (ab36c7a) to head (df5c449).

Files with missing lines	Patch %	Lines
tests/conftest.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #302      +/-   ##
==========================================
- Coverage   76.72%   76.70%   -0.02%     
==========================================
  Files         129      129              
  Lines       34146    34146              
==========================================
- Hits        26198    26193       -5     
- Misses       7948     7953       +5     

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[bogdanp05]

lgtm