feat: add doublestar to exact dir paths (#8180)
### Description
If a user provides a glob that points to a directory e.g. `dist` or
`dist/` then we will add a trailing double star so that the directory
contents get captured instead of just the directory entry itself.
### Testing Instructions
Added unit tests for adding doublestar
Added integration test for verifying that `src/` and `dist` for task
inputs/outputs get treated as `src/**` and `dist/**` respectively.
