Add advance_stacks_tip and advance_burnchain_tip in simnet

[hugocaillard]

In simnet, the chaintip in simnet with advance_chain_tip. And the equivalent in the JS SDK: mineEmpyBlocks(n: number)

It advances:

• the data store height
• the burn data store height
• the tenure height

In epoch 3.0, we want a more granular control over the chain height

• advance_stacks_chaintip
  • only increases the stacks height
• advance_burn_chaintip
  • increases bitcoin, tenure, and stacks height
  • replaces the existing advance_chain_tip method/command to make it more explicit

It will allow to have precise control of the simulated chain height and handle real world scenarios in unit tests