Document: support iceberg on azure blob

[WanYixian]

Description

Support iceberg sink and iceberg source on azure blob.

Hi @wcy-fdu, @chenzl25, I just added doc about supporting iceberg source and source on Azblob, and wanna double check if we support iceberg table engine on azblob? That is to say, if we support the syntax like the following

CREATE CONNECTION public.conn WITH (
   type = 'iceberg',
   catalog.type = 'rest',
   catalog.uri = 'http://localhost:8181/catalog',
   warehouse.path = 'azblob://my-container/demo',
   azblob.container_name = 'my-container',
   azblob.credentials.account_name = '<account>',
   azblob.credentials.account_key = '<key>',
   azblob.endpoint_url = 'https://<account>.blob.core.windows.net/',
   catalog.name = 'demo'
);

Currently, I didn't find azblob-related params here. Any comments are welcome!

Related code PR:

risingwavelabs/iceberg-rust#45
risingwavelabs/risingwave#21468

Related doc issue:

Fix #402

[chenzl25]

cc @wcy-fdu The keys seem to be inconsistent with the code. I think it should be azblob.account_name, azblob.account_key and no azblob.container_name
#[serde(rename = "azblob.account_name")]
pub azblob_account_name: Option,
#[serde(rename = "azblob.account_key")]
pub azblob_account_key: Option,
#[serde(rename = "azblob.endpoint_url")]
pub azblob_endpoint_url: Option,