dbt_utils macros still using dbt_utils.escape_single_quotes

[zachoj10]

Describe the bug

I'm getting a warning when running dbt that the escape_single_quotes macro is now provided in dbt Core. From my digging around, it seems that there are some dbt_utils macros such as pivot() that are still relying on the version that's in dbt_utils instead of dbt Core.

Steps to reproduce

Running a dbt model that utilizes the pivot macro

Expected results

No warnings from using a dbt_utils macro

Actual results

Warning: the `escape_single_quotes` macro is now provided in dbt Core. It is no longer available in dbt_utils and backwards compatibility will be removed in a future version of the package. Use `escape_single_quotes` (no prefix) instead. The *** model triggered this warning.

Screenshots and log output

System information

The contents of your packages.yml file:

packages:
  - package: dbt-labs/dbt_utils
    version: 0.9.1

Which database are you using dbt with?

• postgres
• redshift
• bigquery
• snowflake
• other (specify: ____________)

The output of dbt --version:

Core:
  - installed: 1.2.1
  - latest:    1.2.1 - Up to date!

Plugins:
  - snowflake: 1.2.0 - Up to date!```


### Additional context

From a quick search, it seems that the only spot that `dbt_utils.escape_single_quotes` is referenced is in `pivot.sql` 

### Are you interested in contributing the fix?

Would definitely be interested in helping, I think I can put in a PR myself 

[joellabes]

@zachoj10 this is fixed on the utils-v1 branch, but we might as well resolve it on the 0.9.x version as well. I'd welcome a PR!

[jsnb-devoted]

Could we cut a 0.9.3 branch and release a patch version with this in it?
I made a branch off the 0.9.2 tag and added the commit here: https://github.com/jsnb-devoted/dbt-utils/tree/dev/0.9.3
Would love to get this in before the 1.0 release @joellabes

[bmoore813]

@joellabes poke ☝🏻

[jdub]

@joellabes Current version is 0.9.2 without this fix.

[joellabes]

Just shipped 0.9.5, but this missed the boat 😬 will handle in #728