[Alignment] Deprecate seqan3::alignment_coordinate

[marehr]

resolves seqan/product_backlog#282

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[codecov]

Codecov Report

Merging #2602 (2d1154c) into master (7c8f5c3) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #2602   +/-   ##
=======================================
  Coverage   98.27%   98.27%           
=======================================
  Files         272      272           
  Lines       10789    10795    +6     
=======================================
+ Hits        10603    10609    +6     
  Misses        186      186           

Impacted Files	Coverage Δ
...ment/matrix/detail/alignment_trace_matrix_base.hpp	100.00% <ø> (ø)
...ment/matrix/detail/alignment_trace_matrix_full.hpp	100.00% <ø> (ø)
...trix/detail/alignment_trace_matrix_full_banded.hpp	97.87% <ø> (ø)
...qan3/alignment/matrix/detail/matrix_coordinate.hpp	100.00% <ø> (ø)
...matrix/detail/advanceable_alignment_coordinate.hpp	100.00% <100.00%> (ø)
.../seqan3/alignment/pairwise/alignment_algorithm.hpp	100.00% <100.00%> (ø)
...qan3/alignment/pairwise/edit_distance_unbanded.hpp	99.29% <100.00%> (+0.01%)	⬆️

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[Irallia]

LGFM!
The only thing missing is the lexicographical order in the all.hpp

[eseiler]

Some things regarding deprecation.
Also, a changelog entry is missing. (or is there already one?)