bug: `ionic deploy configure` doesn't recognize `cordova-plugin-ionic` package as a dev dependency!

**Description:**
If I already have installed `cordova-plugin-ionic` package as a *dev dependency* in my project, then when I run `ionic deploy configure` command, it doesn't recognize it!

**Steps to Reproduce:**
1. Install `cordova-plugin-ionic` manually as a *dev dependency* by running `npm install cordova-plugin-ionic --save-dev` command.
3. Run `ionic deploy configure`.

**Output:**
```
[ERROR] Deploy (cordova-plugin-ionic) not yet installed.

Please run ionic deploy add
```

**My `ionic info`:**
```
Ionic:

Ionic CLI : 6.16.2 (C:\Users\ponte\AppData\Roaming\npm\node_modules\@ionic\cli)

Capacitor:

Capacitor CLI : 3.0.0
@capacitor/android : 3.0.0
@capacitor/core : 3.0.0
@capacitor/ios : 3.0.0

Utility:

cordova-res : 0.15.3
native-run (update available: 1.4.0) : 1.3.1

System:

NodeJS : v14.15.1 (C:\Program Files\nodejs\node.exe)
npm : 6.14.8
OS : Windows 10
```

**Other Information:**
If I run `ionic deploy add` command, it tries to reinstall `cordova-plugin-ionic` package, but because it already exists in the dev dependencies list in my `package.json` file, it remains there... So the problem still persists!

Comece reproduzindo o problema com `ionic deploy configure` após instalar `cordova-plugin-ionic` usando `--save-dev`; em seguida, inspecione o `package.json` do projeto e compare o comportamento com `ionic deploy add`. Considera-se concluído quando `configure` reconhece a dependência de desenvolvimento existente e `add` não tenta reinstalá-la.

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