Update Iceberg Document for SELECT Sql Support

[agrawalreetika]

Description

Update Iceberg Document for SELECT Sql Support

Motivation and Context

Since reading v2 row level deletes in Iceberg connector support is added in the connector as part of #21189 So updated Iceberg document accordingly

Impact

None

Test Plan

Na

Contributor checklist

• Please make sure your submission complies with our development, formatting, commit message, and attribution guidelines.
• PR description addresses the issue accurately and concisely. If the change is non-trivial, a GitHub Issue is referenced.
• Documented new properties (with its default value), SQL syntax, functions, or other functionality.
• If release notes are required, they follow the release notes guidelines.
• Adequate tests were added if applicable.
• CI passed.

Release Notes

== NO RELEASE NOTE ==

[github-actions]

Codenotify: Notifying subscribers in CODENOTIFY files for diff 180b0a9...0ee7610.

Notify	File(s)
@steveburnett	presto-docs/src/main/sphinx/connector/iceberg.rst