[JS] Add ability to assert against visual results, Add upload retry

[omacranger]

Description

Adds the ability to assert against Sauce Visual results during test executions on Playwright and unifies the code for other frameworks already utilizing it.

Can either use the sauceVisual.visualResults() fixture or sauceVisualResults function directly to get the result summary for an individual test and make assertions on it like what is available in Cypress / WDIO.

Ex:

test('should be able to login with standard user', async ({ page, sauceVisual }) => {
       // .. other test commands here
        await sauceVisual.visualCheck("Inventory Page");
        expect(await sauceVisual.sauceVisualResults()).toHaveProperty(DiffStatus.Unapproved, 0);
});

This also adds a retry mechanism for DOM / Snapshot uploads to GCS.

Types of Changes

• New feature (non-breaking change which adds functionality)

[konraddysput]

Just in case, I think we should get additional check from @ebekebe or @paweltomaszewskisaucelabs

[ebekebe]

LGTM