Add support for configuration inheritance

[shenglol]

Describe the solution you'd like
I wonder if we can provide a way to allow a configuration file to inherit from another one. Similar to TypeScript's tsconfig.json, this can be done by adding an extends property to specify the path to a base configuration file.

Example

// bicepconfig.base.json
{
  "analyzers": {
    // ...
  }
}

// bicepconfig.dev.json
{
  "extends": "./bicepconfg.base.json"
  "moduleAliases": {
    "ts": {
      "specs": {
        "subscription": "...",
        "resourceGroup": "test-rg" 
      }
    }
  }
}

// bicepconfig.prod.json
{
  "extends": "./bicepconfg.base.json"
  "moduleAliases": {
    "ts": {
      "specs": {
        "subscription": "...",
        "resourceGroup": "prod-rg" 
      }
    }
  }
}

[shenglol]

Related to #5013.

[J0F3]

I think this would be very useful. Especially for Linter configs as I have state out also here: #5013 (comment)