Three tier drill down highcharts

[mail4umar]

In this PR I added the functionality for a three-tier drilldown. This was necessary to plot three-tier plots for query step time using qprof.get_qsteps().

Below is the sample syntax:

import verticapy as vp
data = vp.vDataFrame({
  "gender": ['M', 'M', 'M', 'F', 'F', 'F', 'F'],
  "age": [20, 22, 23, 19, 21, 27, 24],
  "grade": ['A','B','C','A','B','B', 'B'],
  "status": ["pass", "pass", "fail", "fail", "pass", "fail", "fail"],
  "score": [0.99, 0.71, 0.66, 0.92, 0.79, 0.71, 0.77],
  "salary": [21000, 22000, 10000, 32000, 17000, 23000, 12000],
})
vp.set_option("plotting_lib", "highcharts")
data.bar(["grade", "gender", "status"], kind = "drilldown")

[afard]

@mail4umar,
Please make necessary changes so that the Black/lint test passes.

[mail4umar]

@mail4umar, Please make necessary changes so that the Black/lint test passes.

Done.