fix(db-postgres): indexes not created for non unique field names

[DanRibbens]

Description

While working with the Drizzle team on some other issues it was discovered that our index naming method was preventing all of the indexes from being made properly because they need to be unique across all table names.

Changes include

• naming of indexes

• fixed condition to cover hasMany: true text fields

• I have read and understand the CONTRIBUTING.md document in this repository.

Type of change

• Chore (non-breaking change which does not add functionality)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Change to the templates directory (does not affect core functionality)
• Change to the examples directory (does not affect core functionality)
• This change requires a documentation update

Checklist:

• I have added tests that prove my fix is effective or that my feature works
• Existing test suite passes locally with my changes
• I have made corresponding changes to the documentation