Update PG3StripPeaks to not use AlignDetectors algorithm

[sf1919]

Describe the outcome that is desired.
SNSPowderRedux.PG3StripPeaks should no longer use AlignDetectors algorithm.

The proposed change is centered on L219. Currently,

AlignDetectors(InputWorkspace="PG3_4866", OutputWorkspace="PG3_4866", OffsetsWorkspace="PG3_offsets")
ConvertUnits(InputWorkspace="PG3_4866", OutputWorkspace="PG3_4866", Target="TOF")

should become

ApplyDiffCal(InstrumentWorkspace="PG3_4866", OffsetsWorkspace="PG3_offsets")
ConvertUnits(InputWorkspace="PG3_4866", OutputWorkspace="PG3_4866", Target="dSpacing")
ApplyDiffCal(InstrumentWorkspace="PG3_4866", ClearCalibration=True)
ConvertUnits(InputWorkspace="PG3_4866", OutputWorkspace="PG3_4866", Target="TOF")

Additional context
SNSPowderRedux.PG3StripPeaks makes use of the AlignDetectors algorithm. This was deprecated in 2021 (see #30163) and is now being removed as part of #31258. This work is blocking #37799 .

[dmitry-ganyushin]

Fixed with PR #37872