[FilterableDataTable] Fix issue with GROUPCONCAT and multiselect

[pierre-p-s]

Brief summary of changes

When using a multiselect on a group concat set of parameters, the filters gave only perfect matches. For example, if a candidate has 2 subproject AD and MCI, setting the filter to AD will not return the candidate although it should

Issue caught after release on CCNA of v23.0.3

Also thanks @HenriRabalais for the help

[HenriRabalais]

I think this is definitely functionality worth investigating since it seems like it has a big CCNA use case. I think the issue here though is that this PR changes the functionality of the multiselect filter from operating using an equals paradigm, to an includes paradigm. In my opinion, a multiselect should function as multiple selects. Meaning, exact matching between all the selected filter fields, and all the data fields. From what I understand, the proposed PR's changes this to an includes or "multisearch" paradigm, analogous to a search bar that has predetermined options to choose from, which still allow the data to pass the filter even if it is a partial match.

Ideally, I would eventually like to see a drop down beside every filter that allows the user to select the filtering style as equals (e.g. =), includes (e.g. ⊂ or ≈), excludes (e.g. ! or ⊄), or any other relevant filtering types. In the meantime, I personally think this functionality could go into a filter type of it's own, so as not to replace the current multiselect functionality.

I think a discussion of this at a Loris meeting could be beneficial, but I know @laemtl and @ridz1208 had opinions on this as well.

[pierre-p-s]

After discussion during loris meeting, this fix should go through and we should look into making a toggle for the filter that Henri proposed in his above comment. Issue created for new feature: #7458

[driusan]

@HenriRabalais can you update your review

Issue discussed at the loris meeting