[ESQL] Remove filtering out of dot prefixed index patterns

[kertal]

Summary

A quick POC to filter out dot prefixed alias indices like in the following screenshot by @stratoula

Note that it would be better to fix those indices to be hidden, if this is intended.

With the simple change of this PR, non-hidden but . prefixed indices are suggested by the autocomplete of the ES|QL editor:

This can be tested here:
https://kertal-pr-205276-discover-esql-make-use-of-dot-prefixed-ind.kbndev.co/app/r/s/vFXr6

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[kertal]

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💚 Build Succeeded

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• Commit: 6be457f

Metrics [docs]

Async chunks

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

id	before	after	diff
dashboard	666.3KB	666.3KB	+45.0B
esql	202.6KB	202.6KB	+94.0B
lens	1.5MB	1.5MB	+45.0B
total			+184.0B

Page load bundle

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

id	before	after	diff
discover	45.2KB	45.2KB	+45.0B

cc @kertal

[stratoula]

Thanx Matthias for taking the time to look into this but I dont want to procced like this

• it is covering even more the problem
• the logic should not be added in the ES|QL editor

The correct approach is to do an audit to our indexes and mark them as hidden when we dont want to. This is very important as with this way the FROM * wont query them. I have already said the same to Nino and Tim