Fix handling image replotting when the underlying workspace updates

Added unit test to test findContainer without specified ID

Handles if norm is passed to the creation of the original plot
like is done in the mantidqt widgets layer

Create Python StdoutChannel

Refs #29987

and add documentation about the feature. Refs #29987

Refs #29987

There is still something not quite right with the library linking. The
new channel isn't in the library at time of initialization.

Refs #29987

Refs #29987

Refs #29987

Gigg, Martyn Anthony authored Nov 25, 2020 and Peterson, Peter committed Dec 07, 2020

This allows a package build to only include
workbench/mantidplot depending on the cmake
flags that are set.

Martyn Gigg authored Nov 05, 2020 and Peterson, Peter committed Dec 07, 2020

Linux profile scripts now only include PV_PLUGIN_PATH
if Vates is built

Corelli pd cal load 30093

SampleEnvironmentSpec::findContainer does not need to specify a container ID anymore when the sample environment only has a single container.

Corelli pd cal load 30093 master

Fix the issue with changing parameters for MDHisto plots