Make ICAT Search run asynchronously to Refl GUI

[MattKing06]

This is a sub-issue of #14193

Currently the ICAT search is done through this method. This is currently done is series, however it may be possible to use the AlgorithmRunner and do this asynchronously.

[MattKing06]

After some investigation into using AlgorithmRunner, I have found that it needs a QObject to be created which would mean adding member variable to QtReflMainView such that this is possible:

//in QtReflMainView.cpp
m_algoRunnner = MantidQt::API::AlgorithmRunner(this)

The ReflMainPresenter can then access m_algoRunner via m_view->m_algoRunner or something to that effect.

However, when it comes to making the ICAT search go through the AlgorithmRunner, it would mean taking the functionality inside ReflCatalogSearcher and putting it inside of the presenter so that the AlgorithmRunner can be used. Other than that the QtReflMainView is not accessible from ReflCatalogSearcher and therefore no AlgorithmRunner can be instantiated there as there is no QObject to be passed into the constructor.