Open Traffic By Day tab from Stats dashboard card

[guarani]

Opens the older Day tab if Traffic is not enabled by its feature flag.

Thanks to the work in #22695, it was straightforward to handle both the scenario where the Traffic tab is enabled and when it's disabled.

Fixes #22716

To test:

1. With the Traffic feature flag enabled, tap the Today's Stats dashboard card and expect to be taken to the Traffic tab with "By day" selected (even if you had previously "By month" or another period or tab selected).
2. With the Traffic feature flag disabled, tap the Today's Stats dashboard card and expect to be taken to the Days tab (even if you had previously "Months" tab or another tab selected).

Regression Notes

1. Potential unintended areas of impact

The functionality around opening Stats from the Today's Stats card.

3. What I did to test those areas of impact (or what existing automated tests I relied on)

Manual testing

5. What automated tests I added (or what prevented me from doing so)

Navigation isn't suitable for unit testing and we only use UI tests for critical user flows

PR submission checklist:

• I have completed the Regression Notes.
• I have considered adding unit tests for my changes.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

Testing checklist:

• Portrait and landscape orientations.
• iPhone and iPad.

[dangermattic]

	1 Warning
⚠️	This PR is assigned to the milestone 24.4. This milestone is due in less than 4 days. Please make sure to get it merged by then or assign it to a milestone with a later deadline.

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	App Name	WordPress Alpha
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	Build Number	pr22736-3b2fbe5
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	App Center Build	WPiOS - One-Offs #9043

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📲 You can test the changes from this Pull Request in Jetpack Alpha by scanning the QR code below to install the corresponding build.

	App Name	Jetpack Alpha
	Configuration	Release-Alpha
	Build Number	pr22736-3b2fbe5
	Version	24.3
	Bundle ID	com.jetpack.alpha
	Commit	3b2fbe5
	App Center Build	jetpack-installable-builds #8086

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