Have save output where it's saving to

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### Description

Original Author: @dkirillov

When doing `shore save` it does not output to which spinnaker/environment it saved to.

There should be some output that says where the save went.

`shore exec` can also use output - where it's executing the pipeline.

### Steps to Reproduce

1. `shore save`

**Expected behavior:**

**Actual behavior:**

**Reproduces how often:**

### Versions

### Additional Information

Start by locating the Go command handlers for `shore save` and `shore exec`, then trace how each determines the Spinnaker or environment target. Confirm the current command output and define completion as showing where `shore save` saved and where `shore exec` runs the pipeline.

Written by the indexing model from the issue text.