Support self-contained build without fallback dependency modules

Is your feature request related to a problem? Please describe.

If a self-contained build with dependencies is performed, all framework dependencies will be also be included as non-bundled version. Although this behaviour makes sense as fallback option in case any resources were not included in the bundling, it would be good if it can be configured.

Describe the solution you'd like

In given sample application project:

• Dependency to sap/m
• Supported Theme: Horizon
• Support Language: EN

It shall be possible to run a minimal self-contained build...

ui5 build self-contained --all

...that results in the following build output (simplified and no consideration of debug sources):

dist/
├── index.html
├── Component-preload.js
└── resources/
    ├── sap-ui-custom.js
    ├── ui5loader.js
    └── sap/
        ├── ui/
        │   ├── core
        │   └── messagebundle.properties/
        │       └── themes/
        │           └── sap_horizon/
        │               └── library.css
        └── m/
            ├── messagebundle.properties
            └── themes/
                └── sap_horizon/
                    └── library.css       

Start by tracing the ui5 build self-contained --all entry point and how framework dependencies are currently included in the build output. Compare the generated files with the requested minimal dist/ tree; done means the bundled resources remain while non-bundled fallback dependency modules can be omitted.