Lens embeddable doesn't set proper attributes when no results found

[Dosant]

Kibana version: master, 7.x, maybe earlier

Describe the bug:

Dashboard uses a set of attributes on embeddable panels to let reporting and functional tests know when panels finished loading or errored out. look for data-render-complete, data-shared-item etc.

Looks like lens embeddable has a bug, that it doesn't set a proper set of attributes in "no results" state:

<div class="euiPanel euiPanel--borderRadiusMedium euiPanel--plain euiPanel--hasShadow embPanel" data-test-subj="embeddablePanel" data-test-embeddable-id="aa591c29-1a31-4ee1-a71d-b829c06fd162" role="figure" aria-labelledby="ic04cea60-e886-11eb-833f-f5beaf3a9b2f"><div class="embPanel__header embPanel__header--floater"><div class="euiPopover euiPopover--anchorDownRight embPanel__optionsMenuPopover" data-test-subj="embeddablePanelContextMenuClosed"><div class="euiPopover__anchor"><button class="euiButtonIcon euiButtonIcon--text euiButtonIcon--empty euiButtonIcon--xSmall embPanel__optionsMenuButton" type="button" aria-label="Panel options" data-test-subj="embeddablePanelToggleMenuIcon"><svg width="16" height="16" viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg" class="euiIcon euiIcon--medium euiIcon--inherit euiIcon-isLoaded euiButtonIcon__icon" focusable="false" role="img" aria-hidden="true"><path d="M0 6h4v4H0V6zm1 1v2h2V7H1zm5-1h4v4H6V6zm1 1v2h2V7H7zm5-1h4v4h-4V6zm1 3h2V7h-2v2z"></path></svg></button></div></div><span id="ic04cea60-e886-11eb-833f-f5beaf3a9b2f" class="euiScreenReaderOnly">Dashboard panel</span></div><div class="embPanel__content"><div class="lnsExpressionRenderer"><div class="expExpressionRenderer lnsExpressionRenderer__component"><div class="expExpressionRenderer__expression" style="padding: 8px;"><div class="euiText euiText--extraSmall lnsChart__empty"><div class="euiTextAlign euiTextAlign--center"><div class="euiTextColor euiTextColor--subdued"><svg viewBox="0 0 30 22" width="30" height="22" fill="none" xmlns="http://www.w3.org/2000/svg" class="euiIcon euiIcon--large euiIcon--subdued" focusable="false" role="img" aria-hidden="true"><path d="M25 0a1 1 0 011 1v14a1 1 0 01-1 1H5a1 1 0 01-1-1V1a1 1 0 011-1h20zm-9.878 3c-1.887 0-3.265 1.107-3.26 2.61-.005 1.054.67 1.938 1.672 2.157v.067l-.155.03a2.453 2.453 0 00-1.879 2.394C11.495 11.84 12.997 13 15.122 13c2.105 0 3.612-1.16 3.617-2.742-.005-1.217-.903-2.234-2.035-2.424v-.067l.162-.042c.896-.275 1.507-1.12 1.511-2.116C18.373 4.112 16.994 3 15.122 3zm0 5.542c1.036 0 1.796.665 1.806 1.592-.01.898-.718 1.507-1.806 1.507-1.103 0-1.816-.609-1.806-1.507-.01-.932.755-1.592 1.806-1.592zm0-4.164c.908 0 1.53.561 1.54 1.398-.01.85-.651 1.43-1.54 1.43-.903 0-1.55-.584-1.54-1.43-.01-.837.618-1.398 1.54-1.398z" class="lensChartIcon__accent"></path><path d="M1 18h28a1 1 0 011 1v2a1 1 0 01-1 1H1a1 1 0 01-1-1v-2a1 1 0 011-1z" class="lensChartIcon__subdued"></path></svg><div class="euiSpacer euiSpacer--s"></div><p>No results found</p></div></div></div></div></div></div></div></div>

When loaded and has data, attributes are set correctly:

<div data-shared-item="true" data-render-complete="true" data-rendering-count="1" data-test-subj="lnsVisualizationContainer" class="lnsMetricExpression__container lnsVisualizationContainer"

Expected behavior:

In "no results state" all data-render data-shared attributes should be present

Screenshots (if relevant):

Problem with this state:

Any additional context:

• This break dashboard functional tests public async waitForRenderComplete() (cc @elastic/kibana-presentation for awereness)
• This probably breaks reporting (didn't check) (cc @elastic/kibana-reporting-services for awereness)
• Noticed this because now we have lens in sample data and it caused Failing test: X-Pack Search Sessions Integration.x-pack/test/search_sessions_integration/tests/apps/dashboard/async_search/save_search_session_relative_time·ts - Dashboard save a search sessions with relative time Saves and restores a session with relative time ranges #97701 (comment)

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)