FM refactoring and compile times reduction

[N-Maas]

• Refactors localized_kway_fm_core to reduce compile times and remove code that is not used by our configurations (also introduces a small optimization for graphs)
• Includes several refactoring with the overall goal of reducing compile times. Notably, only valid combinations of graph data structure / gain type are now instantiated
• Includes a few small fixes for previous changes (printing the parameters for unconstrained refinement, fixing some warnings)

Clean build times are ~1.5 times faster on my machine while the compilation time for the slowest files is reduced by a factor of 2-3.

[codecov[bot]]

Codecov Report

Merging #163 (412ee65) into master (bf24f75) will increase coverage by 0.89%. The diff coverage is 78.26%.

:exclamation: Current head 412ee65 differs from pull request most recent head f7fe3c6. Consider uploading reports for the commit f7fe3c6 to get more accurate results

@@            Coverage Diff             @@
##           master     #163      +/-   ##
==========================================
+ Coverage   78.32%   79.21%   +0.89%     
==========================================
  Files         201      203       +2     
  Lines       19530    19736     +206     
  Branches     7995     7988       -7     
==========================================
+ Hits        15296    15634     +338     
+ Misses       4234     4102     -132     

Files	Coverage Δ
mt-kahypar/io/sql_plottools_serializer.cpp	92.56% <ø> (ø)
...ar/partition/coarsening/multilevel_uncoarsener.cpp	62.18% <100.00%> (+0.64%)	:arrow_up:
...ahypar/partition/coarsening/nlevel_uncoarsener.cpp	78.21% <100.00%> (+0.21%)	:arrow_up:
...-kahypar/partition/coarsening/nlevel_uncoarsener.h	100.00% <ø> (ø)
.../initial_partitioning/greedy_initial_partitioner.h	100.00% <100.00%> (ø)
...partitioning/initial_partitioning_data_container.h	93.20% <ø> (ø)
.../initial_partitioning/pool_initial_partitioner.cpp	87.09% <ø> (ø)
...-kahypar/partition/refinement/flows/flow_refiner.h	0.00% <ø> (ø)
...partition/refinement/flows/parallel_construction.h	100.00% <ø> (ø)
...t-kahypar/partition/refinement/flows/scheduler.cpp	75.42% <100.00%> (ø)
... and 24 more

... and 59 files with indirect coverage changes

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