The `t2` tool needs to be adapted to be able to graphically represent the role categorization introduced by SERVER-82931 & SERVER-82034.

The current implementation of the BSON object to use for `t2` is:

{
   "start" : Date_t,
   "collector1" : {         
      "start" : Date_t, 
      "data" : { ... }  
      "end" : Date_t,
   },
   "collector2" : { ... },
   ...,
   "end" : Date_t,
}

After SERVER-82034, each collector data will be under a parent field representing a role categorization (common, shard or router), resulting in a new BSON object format that `t2`is not able to parse.

The objective of this ticket is to

• Write all the specifications for the new BSON object format.
• Open a ticket and assign it to the STAR team to change `t2` in favor of the linked specifications.