[PowerBI] Add more flexible options for embedding, enable client resi…

…zing (#1332)

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#### Summary <!-- Provide a general summary of your changes -->
This PR tackles a few minor limitations with the Power BI embedded
experiences.
Allows to set the token for the embed experience separately, removes
unnecessary logic to tweak the size of the part hosting the add-in,
allows to set more granular settings for the embed experience.

#### Work Item(s) <!-- Add the issue number here after the #. The issue
needs to be open and approved. Submitting PRs with no linked issues or
unapproved issues is highly discouraged. -->
Fixes
[AB#538462](https://dynamicssmb2.visualstudio.com/1fcb79e7-ab07-432a-a3c6-6cf5a88ba4a5/_workitems/edit/538462)