Add spdlog logger

[oierlauzi]

Added logging support through spdlog. Loggin calls are performed though XMIPP4_LOG... macros such that the logger could in theory be replaced. By default, spdlog is searched in the system. However, there is an option to build it from the repo. conda/pip installations have it as a dependency

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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