persist_docs should consider column quoting

[drewbanin]

Describe the bug

When running a dbt run, sql statements to persist docs are failing for columns that must be quoted. dbt does not currently respect the quote config when building these DDL statements.

Steps To Reproduce

# dbt_project.yml
name: debug
version: 1.0.0
config-version: 2

models:
  +persist_docs:
    columns: true

-- models/my_model.sql
select 1 as "2id"

# models/schema.yml

version: 2

models:
  - name: debug
    columns:
      - name: 2id
        description: "my description"
        quote: true

Finally, execute dbt run and observe that persisting docs fails.

Expected behavior

The DDL built by dbt should respect the quote config on the column declaration for a dbt node

System information

Which database are you using dbt with?

• postgres
• redshift
• bigquery
• snowflake

This probably does not affect BigQuery since quoting isn't relevant + we use the API

The output of dbt --version:

0.17.0

[drewbanin]

This is not a regression per se - moving it to the Marian Anderson milestone

[jtcohen6]

Resolved by #2733