Add more utility functions for setting collection level parameters

[tmadlener]

BEGINRELEASENOTES

• Add k4FWCore::putCollectionParameter and k4FWCore::getCollectionParameter to facilitate setting and getting collection level parameters / metadata
• Add k4FWCore::putCellIDEncoding and k4FWCore::getCellIDEncoding to facilitate setting and getting CellID encoding strings
• Adapt some tests to use these instead of MetaDataHandles

ENDRELEASENOTES

• Includes Make it posssible to set metadata also from Tools #390
• Includes Deprecate utilities that are intended for internal use only #389

These simply wrap (get|put)Parameter, but call podio::collMetadataParamName (with edm4hep::labels::CellIDEncoding) under the hood first before passing things on. This is a follow up on this discussion.

@jmcarcell it looks like currently the only test for CellID encoding goes through a non-functional algorithm. I think we should add one for functional algorithms as well. Do you have a preference on whether

• I should add a completely new Functional algorithm for this, or
• I should re-use an existing one (e.g. the ExampleFunctionalProducerMultiple)?