Snowflake OAuth authentication ignores role in recipe

[daguito81]

Describe the bug
When using OAUTH_AUTHENTICATOR in a Snowflake recipe, it ignores the role attribute in the recipe. This is taken into account if using DEFAULT_AUTHENTICATOR

To Reproduce
Steps to reproduce the behavior:

1. Create a snowflake recipe specifiying a role
2. Create user without a default role in Snowflake
3. Use OAUTH_AUTHENTICATOR and set up oauth_config block
4. Error will show that it can't connect because no default role has been set up even though the attribute role is specified in the recipe

Expected behavior
It should connect to Snowflake using the role specified in the recipe

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: Windows 10
• Browser: Chrome
• Version (Chrome): 108.0.5359.125
• Version (Datahub): 0.9.2.4

[daguito81]

Created a small PR to solve this issue.