Enable -Werror flag in developer build #4050

Job	Run time
CodeChecks / Basic code checks	54s
DocsBuild / Docs build	1m 5s
Fast builds / Fast builds (windows-latest, OFF, ON, OFF)	1m 2s
Fast builds / Fast builds (windows-latest, OFF, OFF, OFF)	2m 5s
Fast builds / Fast builds (ubuntu-latest, ON, ON, -DCMAKE_BUILD_TYPE=Release -DUMF_BUILD_BENCHMARKS=ON -DUMF_BU...	1s
Fast builds / Fast builds (ubuntu-latest, OFF, OFF, -DCMAKE_BUILD_TYPE=Release -DUMF_BUILD_BENCHMARKS=ON, OFF)	1s
Fast builds / Fast builds (ubuntu-latest, OFF, ON, -DCMAKE_BUILD_TYPE=Release, ON)	7s
Fast builds / Fast builds (ubuntu-20.04, OFF, ON, -DCMAKE_BUILD_TYPE=Release, ON)	1s
MultiNuma	0s
QEMU	0s
DevDax	0s
Basic builds	0s
Sanitizers	0s
CodeQL	0s
CUDA	0s
Benchmarks	0s
L0	0s
ProxyLib	0s
Trivy	0s
Valgrind	0s
Coverage	0s
Coverage_partial	0s
	5m 16s

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