[TEST,FIX] Several more benchmarks, minor optimisations

[h-2]

[h-2]

Jenkins Mac failures are unrelated.

[joshuak94]

@h-2 I'm not sure what all of the seqan2 stuff is for... But I'm sure it makes sense!

[codecov[bot]]

Codecov Report

Merging #1448 into master will not change coverage. The diff coverage is 100%.

@@           Coverage Diff           @@
##           master    #1448   +/-   ##
=======================================
  Coverage   97.59%   97.59%           
=======================================
  Files         232      232           
  Lines        8783     8783           
=======================================
  Hits         8572     8572           
  Misses        211      211

Impacted Files	Coverage Δ
...ude/seqan3/test/performance/sequence_generator.hpp	100% <ø> (ø)	:arrow_up:
...de/seqan3/range/container/bitcompressed_vector.hpp	100% <100%> (ø)	:arrow_up:

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[SGSSGene]

@eseiler will take a look at it, and add the benchmarks that are still uptodate

[eseiler]

Superseded by #3065