[Alignment Configuration] Add free end gap configuration to method_global calls.

[smehringer]

Extracted from #2032

[marehr]

Thank you 😄

[codecov]

Codecov Report

Merging #2046 into release-3.0.2 will decrease coverage by 0.02%.
The diff coverage is n/a.

@@                Coverage Diff                @@
##           release-3.0.2    #2046      +/-   ##
=================================================
- Coverage          97.91%   97.89%   -0.03%     
=================================================
  Files                263      263              
  Lines               9887     9886       -1     
=================================================
- Hits                9681     9678       -3     
- Misses               206      208       +2     

Impacted Files	Coverage Δ
.../seqan3/alignment/pairwise/alignment_algorithm.hpp	98.50% <0.00%> (-1.50%)	⬇️
...qan3/alignment/pairwise/edit_distance_unbanded.hpp	99.24% <0.00%> (-0.01%)	⬇️
...e/seqan3/alignment/pairwise/detail/type_traits.hpp	100.00% <0.00%> (ø)
...qan3/alignment/pairwise/alignment_configurator.hpp	100.00% <0.00%> (ø)
...n3/alignment/configuration/align_config_method.hpp	100.00% <0.00%> (ø)

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[smehringer]

@rrahn early ping, but these PRs are really small and for the alignment free end gap configuration (I noticed to not mention that in the title and maybe you did not prioritize them)

[marehr]

jenkins = broken