Specify exact image(s) to build with skaffold build

`skaffold build --build-images=[]` is useful in being able to build just a subset of images, however the [`strings.Contains()`](https://github.com/GoogleContainerTools/skaffold/blob/6293a3efe10fc12ccb16c2477e59aa4b9335a8dc/pkg/skaffold/config/options.go#L150-L162) matching is problematic for configurations that have similarly named images.

### Expected behavior

Given a config like:

```yaml
apiVersion: skaffold/v4beta11
kind: Config
build:
artifacts:
- image: foo-api
- image: bar-api
- image: bar-api-v2
```

Support some way of building only `bar-api`, e.g. `skaffold build --build-only=bar-api`

### Actual behavior

Both `bar-api` and `bar-api-v2` will be built if you run: `skaffold build --build-image=bar-api`

### Information

- Skaffold version: v2.13.2
- Operating system: macOS
- Installed via: Homebrew
- Contents of skaffold.yaml:

```yaml
apiVersion: skaffold/v4beta11
kind: Config
build:
artifacts:
- image: foo-api
- image: bar-api
- image: bar-api-v2
```

### Steps to reproduce the behavior

Example above.