Vagrant error messages are suppressed

#### Overview of the Issue

When an underlying vagrant issue occurs (such as a plugin issue) the error message from packer can be quite obscure.

For example, an out-of-date Vagrant VMware utility caused Packer to report:

```
Build 'vmware' errored after 8 seconds 844 milliseconds: error: SSH Port was not properly retrieved from SSHConfig.
```

#### Reproduction Steps

Have a config that will produce some vagrant error;

Run a packer build using the vagrant builder.

### Plugin and Packer version

Packer 1.7.2

### Operating system and Environment details

macOS 11.4 on Intel

Start by reproducing the reported failure with a Packer build using the Vagrant builder and compare the visible message with the underlying Vagrant error. The issue names no files or tests, so trace the Vagrant builder's error-handling path and define done as preserving the underlying error details in the reported build failure.

Written by the indexing model from the issue text.