[Lens] Treemap shows excessive padding if its height is greater then 1000px

[markov00]

Kibana version:
since 8.2

Describe the bug:
If the height of a treemap exceeds 1000px paddings are added, reducing the chart size.
This behavior is an unwanted one and probably a missing handled case when unifying the partition chart expression.

This behavior was probably introduced to handle a max size of 1000 px for pie charts, that they looks exceccively big if larger than that size.

Steps to reproduce:

1. create a treemap and add it to a dashboard
2. resize the treemap panel to have a height greater than 100px
3. save the dashboard and refresh the page

Expected behavior:

A treemap can be stretched as much as the user wants without adding paddings.

Screenshots (if relevant):

Errors in browser console (if relevant):
N/A

Any additional context:
The bug was introduced in #122420 and the code that introduce that padding is here:

kibana/src/plugins/chart_expressions/expression_partition_vis/public/utils/get_partition_theme.ts

Lines 128 to 133 in 9e74fcf

	chartPaddings: {
	top: ((1 - Math.min(1, MAX_SIZE / dimensions?.height)) / 2) * dimensions?.height,
	bottom: ((1 - Math.min(1, MAX_SIZE / dimensions?.height)) / 2) * dimensions?.height,
	left: ((1 - Math.min(1, MAX_SIZE / dimensions?.width)) / 2) * dimensions?.height,
	right: ((1 - Math.min(1, MAX_SIZE / dimensions?.width)) / 2) * dimensions?.height,
	},

[elasticmachine]

Pinging @elastic/kibana-visualizations @elastic/kibana-visualizations-external (Team:Visualizations)

[stratoula]

I think that it should only add paddings when in aggbased editor. In Lens the paddings are not applied and are not needed and on embeddable level we don't want them in general because they create the issue described above.