Add Coarse provider #2936

Job	Run time
Build docs	48s
Coding style	56s
Spellcheck / Run spell check	9s
Fast builds / Fast builds (windows-latest, OFF, ON, OFF)	3m 41s
Fast builds / Fast builds (windows-latest, OFF, OFF, OFF)	2m 27s
Fast builds / Fast builds (ubuntu-latest, ON, ON, -DCMAKE_BUILD_TYPE=Release -DUMF_BUILD_BENCHMARKS=ON -DUMF_BU...	2m 16s
Fast builds / Fast builds (ubuntu-latest, OFF, OFF, -DCMAKE_BUILD_TYPE=Release -DUMF_BUILD_BENCHMARKS=ON, OFF)	1m 2s
Fast builds / Fast builds (ubuntu-latest, OFF, ON, -DCMAKE_BUILD_TYPE=Release, ON)	2m 5s
Fast builds / Fast builds (ubuntu-20.04, OFF, ON, -DCMAKE_BUILD_TYPE=Release, ON)	1m 55s
Basic builds	1s
Sanitizers	1s
Qemu	1s
MultiNuma	1s
Benchmarks	1s
GPU	1s
ProxyLib	1s
Valgrind	1s
	15m 27s

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