HistogramData rollout: ConvFit.cpp to ResNorm.cpp

[PranavBahuguna]

This PR is part of refactoring effort to use the new interface of the HistogramData module.
See #17641 for details.

The following algorithms were converted to use HistogramData:

• MantidQt/CustomInterfaces/src/Indirect/ConvFit.cpp
• MantidQt/CustomInterfaces/src/Indirect/CorrectionsTab.cpp
• MantidQt/CustomInterfaces/src/Indirect/IndirectDataReductionTab.cpp
• MantidQt/CustomInterfaces/src/Indirect/IndirectSymmetrise.cpp
• MantidQt/CustomInterfaces/src/Indirect/Iqt.cpp
• MantidQt/CustomInterfaces/src/Indirect/IqtFit.cpp
• MantidQt/CustomInterfaces/src/Indirect/ISISCalibration.cpp
• MantidQt/CustomInterfaces/src/Indirect/ISISDiagnostics.cpp
• MantidQt/CustomInterfaces/src/Indirect/ISISEnergyTransfer.cpp
• MantidQt/CustomInterfaces/src/Indirect/ResNorm.cpp

No performance tests were added.

No algorithms show significantly improved performance.

Fixes #18755.

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[KarlPalmen]

If I run indirect data reduction ISIS Energy Transfer after just loading file iris26176_graphite002_red.nxs, Mantid gets an unexpected exception Attempt to assign property (SpectrumMin) of incorrect type.

[PranavBahuguna]

@KarlPalmen I tried doing the same thing on master and got the same result. This means that it isn't the result of any changes I made.

[PranavBahuguna]

@KarlPalmen According to @louisemccann, this shouldn't work anyway as iris26176_graphite002_red.nxs is already reduced data. If you wish to test this, ensure you have access to the ADS and type in 26176, this will load a .raw file.

[KarlPalmen]

I tried the suggestion and it worked. Other tests that I believe use the modified code also work.