[FIX] relax seqan3::views::minimiser requirements to be C++20 compatible

[marehr]

Part of seqan/product_backlog#403

[vercel]

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[codecov]

Codecov Report

Merging #2845 (111f219) into master (dcbba96) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2845   +/-   ##
=======================================
  Coverage   98.37%   98.37%           
=======================================
  Files         277      277           
  Lines       10963    10963           
=======================================
  Hits        10785    10785           
  Misses        178      178           

Impacted Files	Coverage Δ
include/seqan3/search/views/minimiser.hpp	100.00% <ø> (ø)

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