Restore line numbers for Input

Line number information in tracebacks from input are restored. Line numbers from input were removed during the transition to v8 enhanced traceback reporting.

So, instead of:

---------------------------------------------------------------------------
ZeroDivisionError                         Traceback (most recent call last)
Input In [3], in <cell line: 1>()
----> 1 myfunc(2)

Input In [2], in myfunc(z)
      1 def myfunc(z):
----> 2     foo.boo(z-1)

File ~/code/python/ipython/foo.py:3, in boo(x)
      2 def boo(x):
----> 3     return 1/(1-x)

ZeroDivisionError: division by zero

The error traceback now looks like:

---------------------------------------------------------------------------
ZeroDivisionError                         Traceback (most recent call last)
Cell In [3], line 1
----> 1 myfunc(2)

Cell In [2], line 2, in myfunc(z)
      1 def myfunc(z):
----> 2     foo.boo(z-1)

File ~/code/python/ipython/foo.py:3, in boo(x)
      2 def boo(x):
----> 3     return 1/(1-x)

ZeroDivisionError: division by zero

or, with xmode=Plain:

Traceback (most recent call last):
  Cell In [12], line 1
    myfunc(2)
  Cell In [6], line 2 in myfunc
    foo.boo(z-1)
  File ~/code/python/ipython/foo.py:3 in boo
    return 1/(1-x)
ZeroDivisionError: division by zero