Consistently name intrinsic Cluster angles

[tmadlener]

BEGINRELEASENOTES

• Make Cluster intrinsic phi consistent in naming with intrinsic theta, i.e. rename phi to iPhi

ENDRELEASENOTES

This currently needs the following PRs / fixes in podio.

• Change the grammar of the schema evolution files AIDASoft/podio#845
• Make it possible to pass multiple old datamodel definitions to the generator script AIDASoft/podio#828
• Do not read ExtraCode for old schemas when doing schema evolution AIDASoft/podio#890
• Make schema evolution code gen handle dropped components AIDASoft/podio#889
• Fix misleading warning in schema evolution detection for unrelated changes AIDASoft/podio#888
• Fix code gen for old versions of array members AIDASoft/podio#886

It also builds on top of

• Store old schema versions explicitly #464

[tmadlener]

All tests introduced in #467 still work with these changes (once all the necessary changes have landed in podio).

[tmadlener]

Deprecation warnings for [g,s]etPhi will appear in

• k4EDM4hep2LcioConv
• k4GaudiPandora

With the temporary addition of the old methods via ExtraCode I can build the stack locally with these changes.