Adds get all REST API to data views

[lukasolson]

Summary

Closes #99928.

Adds a "get all" REST API for data views.

Example usage

Request:

GET /api/data_views

Response:

{
    "data_view": [
        {
            "id": "90943e30-9a47-11e8-b64d-95841ca0b247",
            "namespaces": [
                "default"
            ],
            "title": "kibana_sample_data_logs"
        },
        {
            "id": "ff959d40-b880-11e8-a6d9-e546fe2bba5f",
            "namespaces": [
                "default"
            ],
            "title": "kibana_sample_data_ecommerce",
            "typeMeta": {}
        },
        {
            "id": "d3d7af60-4c81-11e8-b3d7-01146121b73d",
            "namespaces": [
                "default"
            ],
            "title": "kibana_sample_data_flights"
        }
    ]
}

Checklist

• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios

Release note

Adds a "get all" REST API for data views: GET /api/data_views

[elasticmachine]

Pinging @elastic/kibana-app-services (Team:AppServicesSv)

[mattkime]

Overall it looks good but it would be good to add an api integration test. This is a good example - test/api_integration/apis/index_patterns/index_pattern_crud/get_index_pattern

[mattkime]

this also return the type if not default. add "type": "rollup" to make this a rollup data view example

[mattkime]

Just one comment about docs, otherwise good to go

[kibana-ci]

💚 Build Succeeded

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Metrics [docs]

✅ unchanged

History

• 💔 Build #47642 failed 03318e8
• 💚 Build #43860 succeeded ce8ad06
• 💔 Build #43418 failed 49c18a9
• 💔 Build #42931 failed 72eba7e
• 💔 Build #42930 failed 62994dc

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

cc @lukasolson

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You can also create backports manually by running node scripts/backport --pr 131683 locally

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Friendly reminder: Looks like this PR hasn’t been backported yet.
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You can also create backports manually by running node scripts/backport --pr 131683 locally

[kibanamachine]

💔 All backports failed

Status	Branch	Result
❌	9.0	The branch "9.0" does not exist

Manual backport

To create the backport manually run:

node scripts/backport --pr 131683

Questions ?

Please refer to the Backport tool documentation

[rashmivkulkarni]

Just a suggestion : It would be nice have append it with kbn:
GET kbn:/api/data_views

works perfect though!