Skip traversing the whole data set in Icerberg `list` tables endpoint when offset is set.

[ferranbt]

When an offset is set, the Iceberg list /tables endpoint reads the whole data from the beginning until reaching the offset. I believe Iceberg might provide primitives to determine the specific file location for an offset so that we can skip a full read.

[ferranbt]

Partially fixed in #19 since now Iceberg returns a stream and it does not need to skip the offset every time.