Add exporter support for spans that aren't stored in a single contiguous segment

[pyohannes]

The current exporter implementation assumes, that spans are passed as a contiguous array. This might not be the case for spans stored in circular buffers (#52).

The exporter interface should be adapted to support exporting spans that aren't stored as a contiguous array.

[lalitb]

@pyohannes - Is this duplicate to #62 ?

[pyohannes]

@lalitb Yes, this is contained in #62.

[github-actions]

This issue was marked as stale due to lack of activity. It will be closed in 7 days if no furthur activity occurs.

[github-actions]

Closed as inactive. Feel free to reopen if this is still an issue.