ARROW-4918: [C++] Add cmake-format to pre-commit

[xhochy]

Also extended the pattern to cover all the CMake code I've written in the last weeks.

[fsaintjacques]

LGTM

[wesm]

Hm, do we want to reformat all the cmake_modules/* files? Some of these have code reused from other projects and so it could just cause unnecessary divergence. Definitely we should keep ThirdpartyToolchain.cmake clean

[xhochy]

Hm, do we want to reformat all the cmake_modules/* files? Some of these have code reused from other projects and so it could just cause unnecessary divergence. Definitely we should keep ThirdpartyToolchain.cmake clean

Changed this to an explicit list and reverted the changes to the files that were imported.

[codecov-io]

Codecov Report

Merging #3935 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3935      +/-   ##
==========================================
- Coverage   87.75%   87.74%   -0.01%     
==========================================
  Files         727      727              
  Lines       89507    89507              
  Branches     1252     1252              
==========================================
- Hits        78547    78542       -5     
- Misses      10842    10847       +5     
  Partials      118      118

Impacted Files	Coverage Δ
js/src/ipc/metadata/json.ts	92.39% <0%> (-4.35%)	⬇️
js/src/ipc/metadata/message.ts	92.99% <0%> (-1.28%)	⬇️
js/src/schema.ts	88.77% <0%> (-1.03%)	⬇️
cpp/src/plasma/store.cc	91.5% <0%> (+0.33%)	⬆️
cpp/src/plasma/thirdparty/ae/ae.c	71.69% <0%> (+0.94%)	⬆️

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[wesm]

+1