BUG: styler multiindex hiding indexes and columns alignment

[attack68]

Follows #43686

• closes BUG: styler.to_latex does hide rows after hide_index([subset]) #43637
• closes BUG: styler hide_index hide_columns misaligns multiindex #43644
• closes BUG: styler render trimming rows does not work with hide_index #43703
• tests added / passed
• whatsnew entry (note part of the bug seems to have been created by hiding levels which is a new feature in 1.4.0).

This PR has two parts:

1. Addressing the bug fixes as per above.

The key change made here was to add a single line: if r not in self.hidden_rows: in the loop, and in _translate_latex update for the new object structure that is input to it.

2. Refactoring the code so that the main part of the code is now easier to grok:

def _translate(...):
    # calls _translate_header()
    # callls _translate_body()

def _translate_header(...):
   # calls _generate_col_header_row()
   # calls _generate_index_names_row()

def _translate_body(...):
   # calls _generate_trimmed_row()
   # calls _generate_body_row()

And tests were update and comprehensive tests for the issues added.

[attack68]

only added this line to this method and all code below it was indended one tab.

[jreback]

might be worth splitting up translate_body to some function calls to make it simpler to grok (future)

[attack68]

yeh agreed, i already did this once splitting _translate into header and body and now it has acquired some more stuff, like min/mix limiting etc.. will add an issue

[attack68]

i will finish making this clean up after #43686

[jreback]

might be worth a property to have this

[attack68]

this is only needed for latex, so for most cases not necessary and might add additional overhead for large HTML (usually latex tables quite a lot smaller)

[attack68]

took a second look here. d is dynamic so a class property won't work. think the comment is sufficient.

[attack68]

because of moving the hiding functions to outer loop:

before           after         ratio
     [cd13e3a4]       [75de033c]
     <master>         <bug_styler_multiindex_hiding>
-      11.2±0.1ms       9.44±0.3ms     0.85  io.style.Render.time_apply_format_hide_render(24, 12)
-     6.57±0.09ms      5.39±0.06ms     0.82  io.style.Render.time_apply_format_hide_render(12, 12)
-        19.2±7ms       12.2±0.2ms     0.64  io.style.Render.time_apply_format_hide_render(36, 12)
-      45.1±0.6ms       20.7±0.5ms     0.46  io.style.Render.time_apply_format_hide_render(24, 120)
-        26.6±3ms       11.9±0.5ms     0.45  io.style.Render.time_apply_format_hide_render(12, 120)
-      68.6±0.8ms       28.8±0.2ms     0.42  io.style.Render.time_apply_format_hide_render(36, 120)

SOME BENCHMARKS HAVE CHANGED SIGNIFICANTLY.
PERFORMANCE INCREASED.

[jreback]

thanks!