bugfix(react-dialog): remove triple slash ref

[bsunderhus]

Previous Behavior

New Behavior

1. removes triple slash reference from e2e tests

Related Issue(s)

• Fixes #

[codesandbox-ci[bot]]

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[fabricteam]

Perf Analysis (@fluentui/react-components)

Scenario	Render type	Master Ticks	PR Ticks	Iterations	Status
FluentProviderWithTheme	virtual-rerender	38	32	10	Possible regression
FluentProviderWithTheme	virtual-rerender-with-unmount	72	76	10	Possible regression

All results

Scenario	Render type	Master Ticks	PR Ticks	Iterations	Status
Avatar	mount	625	651	5000
Button	mount	307	302	5000
Field	mount	1105	1109	5000
FluentProvider	mount	742	707	5000
FluentProviderWithTheme	mount	82	76	10
FluentProviderWithTheme	virtual-rerender	38	32	10	Possible regression
FluentProviderWithTheme	virtual-rerender-with-unmount	72	76	10	Possible regression
MakeStyles	mount	871	858	50000
Persona	mount	1758	1756	5000
SpinButton	mount	1387	1409	5000
SwatchPicker	mount	1523	1548	5000

[fabricteam]

📊 Bundle size report

✅ No changes found

[Hotell]

admin merged - VR pipelines are failing because internal issues with the tool. this PR is needed to unblock master and doesn't affect VR test outcome in any way