add support to gather all patches produced by different tools in a common list

[monperrus]

we need to put all the patches gathered by different tools in a common list, so that we can do a common program analysis on all of them, in particular overfitting ranking.

this is closely related to #842

[jianguda]

Done. #849

[SophieHYe]

Hi @monperrus @ycaxgjd @btellstrom
After review, this task is a bit ambiguous.
If the issue only focuses on providing a list of generated patches for the respirator pipeline, the task had been completed before and Jian added a supplemented JUnit test for it.

Some comment from me:
I was expecting a bit more about this issue which is similar to this script, it provides the functions:
(1) query build IDs in a specific date range.
(2) for each build ID, query the generated patches for it.
Maybe we can base on this script to format the return patches as a list and group by tools. As @btellstrom suggested, having it in java and auto-updating it would certainly be a benefit.

[monperrus]

per our discussion today, everything is OK