collect_univ_params_ignoring_tactics isn't called on anonymous instances

[bryangingechen]

Bug identified by @jcommelin and @digama0 in this zulip thread.

Example:

universes u v

class foo (C : Type u) : Type (max u (v+1)) := (A : Type v)

variables (C : Type u) [foo C]

def bar : Type u := C

kernel failed to type check declaration 'bar' this is usually due to a buggy tactic or a bug in the builtin elaborator
elaborated type:
  Π (C : Type u) [_inst_1 : foo C], Type u
elaborated value:
  λ (C : Type u) [_inst_1 : foo C], C
nested exception message:
invalid reference to undefined universe level parameter 'u_1'

"I think it pulled in _inst_1 : foo.{u u_1} C but forgot to also pull in u_1"

@Kha pointed out that the issue was in collect_univ_params_ignoring_tactics.