[QC-652] Add an executable to update the metadata of an object.

[Barthelemy]

Needs AliceO2Group/AliceO2#7653

[knopers8]

Thanks, this is very nice. I leave a few comments to consider/discuss.

I am wondering how fast it will be to overwrite some key/value for all MOs in a run if the tool is executed for each object separately. I suppose we just have to see. As a room for improvement, we could ask Costin to provide us with a call to overwrite all objects which match path & metadata.

Also, as far as I understand, using this tool will still require us to do some preparatory work before changing anything. Imagine that I want to change a key/value pair for all runs for a specific period and pass. How do I get the list of timestamps or ids to use while invoking the application? Is it something trivial?

[Barthelemy]

As you noted this tool is still very basic. Selecting objects to update and updating a group of objects is not part of it.

[knopers8]

thanks!