[ES|QL] Migration to new ES|QL grammar

[dej611]

Summary

This PR aligns the (new) Kibana grammar to the newer ES grammar changes proposed in elastic/elasticsearch#100740 .

EXPAND and INLINESTATS has been reinstated here (even when not used) to exactly match the ES grammar.

Most of the changes are due to TOKEN renaming plus few other changes on how identifiers are now parsed.

Revisit the validation logic helped also to find a couple of bugs on our validation side, but they were very minimal and limited.

Checklist

• Unit or functional tests were updated or added to match the most common scenarios

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: ecdd38c

Metrics [docs]

Page load bundle

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

id	before	after	diff
kbnUiSharedDeps-srcJs	2.3MB	2.3MB	-26.0B

History

• 💚 Build #181733 succeeded ddc1712
• 💔 Build #181685 failed c016856
• 💔 Build #181672 failed 7789213
• 💔 Build #181462 failed 9a0f754
• 💔 Build #181281 failed 8c5046f
• 💔 Build #181256 failed 64f58ed

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@elasticmachine merge upstream