feat(esp_ringbuf): Add vRingbufferReset (IDFGH-16385)

[Dazza0]

Description

This PR adds a vRingbufferReset() function and its behavior is similar to xQueueReset(). Associated unit tests also added.

Related

Testing

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[SoucheSouche]

Hi @Dazza0, thanks for the contribution. It looks ok to me so I will submit it for internal review.

[SoucheSouche]

Hi @Dazza0, the PR just merged internally.