Flow component for windows_exporter

[rfratto]

In addition to #1684, it would be beneficial to have a windows_exporter component so that we make sure Flow works on Windows.

It is not yet obvious how these components will expose metrics. The prototype had an integration.github component which exported an integration-specific metrics endpoint as its state.

The implementation of this component may do something similar, or it may push scraped metrics directly to a receiver. It is up to the discretion of the implementor to weigh the trade offs and pick a path forward, though it should be noted that the chose made will likely influence how other exporter components are implemented.

It is recommended to re-use the existing windows_exporter integration code as much as possible for building this component.

[github-actions[bot]]

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[marctc]

Fixed in #3547