TableName not removed when pushing predicates in derived tables

[GuptaManan100]

Overview of the Issue

Running the following query returns an error in gen4.

 select table_name from (select * from information_schema.`tables` where table_schema = database()) as _subquery where _subquery.table_type = 'a' and _subquery.table_name = 'a'

The plan produced from Gen4 is

{
  "QueryType": "SELECT",
  "Original": "select table_name from (select * from information_schema.`tables` where table_schema = database()) as _subquery where _subquery.table_type = 'a' and _subquery.table_name = 'a'",
  "Instructions": {
    "OperatorType": "Route",
    "Variant": "SelectDBA",
    "Keyspace": {
      "Name": "main",
      "Sharded": false
    },
    "FieldQuery": "select table_name from (select * from information_schema.`tables` where 1 != 1) as _subquery where 1 != 1",
    "Query": "select table_name from (select * from information_schema.`tables` where table_schema = database() and _subquery.table_type = 'a' and _subquery.table_name = :_subquery_table_name) as _subquery",
    "SysTableTableName": "[_subquery_table_name:VARBINARY(\"a\")]",
    "Table": "information_schema.`tables`"
  }
}

The alias of the derived table is not removed while pushing the predicates inside.

Reproduction Steps

Steps to reproduce this issue:

1. Copy the query to onecase.txt and run the plan tests.

Binary version

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