Add output label option to ISIS Energy Transfer tab of Data Reduction

[MohamedAlmaki]

Description of work

This PR adds an output label option to the ISIS Energy Transfer tab in the Indirect Data Reduction interface. The output label will be appended to the output name and doesn't override previous outputs.

Summary of work

Fixes #38410.

To test:

1- Open Indirect Data Reduction interface
2- Go to ISIS Energy Transfer tab
3- Select IRIS, graphite 002
4- Load run 26176
5- Choose an output label
6- Click Run
7- The output label should be appended to the output name
8- Choose a different output label
9- Click Run
10- It should not override the previous data which was output in the ADS

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[MohamedAlmaki]

Working on resolving the test failure

[GuiMacielPereira]

I think this is a great solution to make sure workspaces are not overwritten and it is working well.

The only problem that I see is that using the OutputNameView widget also displays the 'current output name' which suggests that an workspace with that name will be created. However, because the mehtod m_outputNamePresenter.setOutputWsBasename() is never called, the name that the OutputName widget displays does not have a basename, eg. iris26176_graphite002, so instead of displaying the expected iris26176_graphite002_some-label_red, it's only showing _some-label.

I think this is quite tricky to fix before code freeze, so what I think the simpler solution is is to just hide this part:

Since in OutputNameView.cpp you have the example of enableLabelEditor() I think you can write a similar function to disable the other text box?

If this proves to be too much, I am also happy to aprove as it is before code freeze, because ultimately I think the new functunality justifies it, and we can always improve it later in the nightly.

[MohamedAlmaki]

Yes, it should be hidden, how did you reproduce this? In my machine it is not shown. enableLabelEditor should only enable the input box and not the warning label

[GuiMacielPereira]

I am running on Linux, Ubuntu 20.04. I just built mantid as usual and opened the interface.

[MohamedAlmaki]

Ok, I will check it thanks

[sf1919]

The release note structure for v6.13 has been created. You can now rebase your branch and move the release note in this PR.