Document avro.schema.literal property use for interpreting table data

[Jessie212]

Description

Document avro.schema.literal property use for interpreting table data

Additional context and related issues

#14426

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# Section
* Fix some things. ({issue}`issuenumber`)

[mosabua]

Lets put this on hold until the PR from @m57lyra is merged and then rebase and put it into the correct location.

[mosabua]

I think this is wrong

avro.schema.literal table property

I think this is a catalog configuration property

and the _ version is either a table property or a session property

[findinpath]

avro.schema.literal -> avro_schema_literal

However this paragraph is mostly about avro_schema_url and how to eventually retrieve the avro schema of the table.

[findinpath]

@mosabua avro.schema.literal and avro.schema.url are Hive specific table properties.

[mosabua]

Maybe @colebow or @findinpath can clarify the technical aspects..

[m57lyra]

It is merged @mosabua as of today. Good to go!

[mosabua]

Looks good.

[mosabua]

Could @ebyhr @hashhar or @findepi review and merge please