[backend] Fix dashboard import minimal version check (#6181)

[SouadHadjiat]

Proposed changes

• use semver lib to compare version
• add tests

Related issues

• Dashboard exported on 6.0 can't be imported again (invalid version error) #6181

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.68%. Comparing base (3fd83cd) to head (ab6c4d5).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6184   +/-   ##
=======================================
  Coverage   66.67%   66.68%           
=======================================
  Files         540      541    +1     
  Lines       64349    64349           
  Branches     5250     5248    -2     
=======================================
+ Hits        42907    42912    +5     
+ Misses      21442    21437    -5     

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