Add Apache Iceberg IO connector

[damccorm]

Apache Iceberg is an open table format layer on top of different filesystems.

Beam could support it in the form of an IO connector ideally integrating with Beam's own system for SQL support.

Inspiration can be taken from the ongoing effort to support Iceberg on Flink:
apache/iceberg#788
https://docs.google.com/document/d/1idTjQCubhOCea8LkKJ_5aMTV4V_Wf1n0aYhabGsLQZc/edit

Imported from Jira BEAM-10160. Original Jira may contain additional context.
Reported by: iemejia.

[gabry-lab]

any updates?

[yupbank]

any updates?

[yeshvantbhavnasi]

any updates ?

[brucearctor]

@gabrywu , @yupbank , @yeshvantbhavnasi -- nobody is assigned [ therefore potentially not being worked on ], so not clear how quickly this will progress. That said, it is also open, and therefore something that anyone could work on and contribute. Contributions welcome! :-)

[pabloem]

hi folks - I am taking a look at this...

[jotarada]

Hey folks, is there any plans regarding this?

[kellen]

@pabloem ping from Spotify

[chadlagore]

Affirm interested in this 👀 cc @lydian

[aromanenko-dev]

CC: @mosche