[Canvas] Add Lens Embeddables

[cqliu1]

Summary

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Checklist

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• This was checked for cross-browser compatibility, including a check against IE11
• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios
• This was checked for keyboard-only and screenreader accessibility

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• This was checked for breaking API changes and was labeled appropriately
• This includes a feature addition or change that requires a release note and was labeled appropriately

[kibanamachine]

💔 Build Failed

• continuous-integration/kibana-ci/pull-request
• Commit: 6834902

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Test Failures

Kibana Pipeline / x-pack-intake-agent / X-Pack Jest Tests.x-pack/legacy/plugins/canvas/canvas_plugin_src/renderers/embeddable.input to expression Lens Embeddable converts to a savedLens expression

Link to Jenkins

Standard Out

Failed Tests Reporter:
  - Test has not failed recently on tracked branches

Stack Trace

Error: expect(received).toBe(expected) // Object.is equality

Expected: "bar"
Received: "foo"
    at Object.it (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/x-pack/legacy/plugins/canvas/canvas_plugin_src/renderers/embeddable/embeddable_input_to_expression.test.ts:78:21)
    at Object.asyncJestTest (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/node_modules/jest-jasmine2/build/jasmineAsyncInstall.js:102:37)
    at resolve (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/node_modules/jest-jasmine2/build/queueRunner.js:43:12)
    at new Promise (<anonymous>)
    at mapper (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/node_modules/jest-jasmine2/build/queueRunner.js:26:19)
    at promise.then (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/node_modules/jest-jasmine2/build/queueRunner.js:73:41)
    at process._tickCallback (internal/process/next_tick.js:68:7)

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

[elasticmachine]

Pinging @elastic/kibana-canvas (Team:Canvas)

[cqliu1]

Closing in favor of PR #57499.