[Maps] Add percentile

[thomasneirynck]

Summary

Closes #78592

Adds the ability to compute a percentile for agg-sources. Can be used for cluster/grid layers and in term joins.

Users can set the percentage explicitly. When set to 50, it computes the median.

Internal users of the MapsEmbeddable can add this to their layer-descriptor:

e.g. for a choropleth-map, in the joins-property:

"joins": [
			{
				"leftField": "iso2",
				"right": {
					"type": "ES_TERM_SOURCE",
					"id": "9159a723-72b3-4586-912b-510f844254cc",
					"indexPatternTitle": "kibana_sample_data_logs",
					"term": "geo.dest",
					"metrics": [
						{
							"label": "median",
							"type": "percentile",
							"field": "bytes",
                                                        "percentile": 50
						}
					],
					"applyGlobalQuery": true,
					"applyGlobalTime": true,
					"indexPatternRefName": "layer_2_join_0_index_pattern"
				}
			}
		]

This can then be refered back to by its unique name in the style-descriptors.

e.g. fill-color

	"fillColor": {
					"type": "DYNAMIC",
					"options": {
						"color": "Yellow to Red",
						"colorCategory": "palette_0",
						"field": {
							"origin": "join",
							"name": "__kbnjoin__percentile_of_bytes__9159a723-72b3-4586-912b-510f844254cc_50"
						},
						"fieldMetaOptions": {
							"isEnabled": true,
							"sigma": 3
						},
						"type": "ORDINAL"
					}
				},

Checklist

Delete any items that are not applicable to this PR.

• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Unit or functional tests were updated or added to match the most common scenarios
• Any UI touched in this PR is usable by keyboard only (learn more about keyboard accessibility)
• This renders correctly on smaller devices using a responsive layout. (You can test this in your browser)
• This was checked for cross-browser compatibility

For maintainers

• This was checked for breaking API changes and was labeled appropriately

[nreese]

I am able to consistently make the features disappear with the following steps

• Create a new map
• Add clusters layer
• Change count aggregation to percentile
• Slowly move slider to the right trying to set to 90th.
• At some point, the map stops showing clusters and there are no errors in the console. See the screen shot below. There should be clusters since there is data for the past 24 hours and no filters are applied.

[nreese]

lgtm with a few nits to clean up
code review, tested in chrome

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 49239fa

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
maps	657	660	+3

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
maps	2.8MB	2.8MB	+7.5KB

Distributable file count

id	before	after	diff
default	47145	47905	+760

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
maps	152.2KB	152.3KB	+168.0B

History

• 💔 Build #94574 failed b7e8b73
• 💚 Build #94487 succeeded c53d81d
• 💚 Build #94261 succeeded 02ccab5
• 💔 Build #94251 failed 0ea0b06
• 💚 Build #94120 succeeded ca95f46

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