PWGHF: Add Dstar-hadron correlation task

[deependra170598]

Hi @fgrosa , @vkucera , I tried to add a correlation task for Dstar-Hadron pair in this PR. For that, I applied the following changes...
1). Change in the data model of the Dstar table (HfCandDstarBase). I added two more columns for Prong0Id and Prong1Id of the D0 particle.
2). Created a new Table for the Dstar-Hadron pair in HFC/DataModel with the name DstarHadronPair
3). Added correlator Table producer with two process functions right now (for same event & mixed event) only for Data
4). Added correlation task which uses the above tables to fill signal and sideband regions. right now It has only two process functions. Later for MC data, I add functionality.

Please give your suggestion for improvement.

[vkucera]

Thanks @deependra170598 , for addressing my comments.
I let the other conveners/coordinators review and approve.

[fgrosa]

Thanks @deependra170598 , for addressing my comments. I let the other conveners/coordinators review and approve.

It looks good to me, thanks for reviewing it @vkucera! I think we can merge (you have to approve since you requested changes previously)