feat(HMR): expose context

[vchimev]

The context consists of an object with type and module properties:

• type could be markup, script or style
• module is the relative path to the module

PR Checklist

• The PR title follows our guidelines: https://github.com/NativeScript/NativeScript/blob/master/CONTRIBUTING.md#commit-messages.
• There is an issue for the bug/feature this PR is for. To avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it.
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• All existing tests are passing: https://github.com/NativeScript/nativescript-dev-webpack/blob/master/CONTRIBUTING.md#testing-locally-by-running-e2e-tests
• Tests for the changes are included.

What is the current behavior?

Currently, global.__hmrRefresh() function accepts atype parameter which doesn't pass to global.__onLiveSync function.

What is the new behavior?

The new behavior changes global.__hmrRefresh() function to accept a context { type, module } object and pass it to global.__onLiveSync function.

In this way, the cross-platform modules (tns-core-modules) could handle different scenarios based on the context.

Relates to NativeScript/NativeScript#6665.
Implements a part of NativeScript/NativeScript#6645.