Reduce usage of config parser

Since issue #86 (closed) and what is discussed in autosubmit#1412, there are potential possible inconsistencies that can be generated by using the current state of the configuration files as a source of truth.

To avoid it, the alternative is to rely on the content of the experiment_run data. Also, there are some parts of the code where this configuration data can be obtained from other DDBB tables.

Additionally, this can significantly lower the IO operations done on the Home Page of the GUI which will be good for solving the problem we have on https://climatedt-wf.csc.fi/