Merge pull request #27255 from martyngigg/PEARL-idf-update

...lysis/reference/ISIS_Powder-PEARL00098472_splined.nxs.md5

...sis/reference/ISIS_Powder-PEARL00098507_tt70Atten.nxs.md5

...s/reference/ISIS_Powder-PEARL00098507_tt70_absorb.nxs.md5

.../analysis/reference/ISIS_Powder_PRL98472_tt70_all.nxs.md5

...alysis/reference/ISIS_Powder_PRL98472_tt70_groups.nxs.md5

...analysis/reference/ISIS_Powder_PRL98472_tt70_mods.nxs.md5

...nalysis/reference/ISIS_Powder_PRL98472_tt70_trans.nxs.md5

docs/source/release/v4.2.0/framework.rst

instrument/PEARL_Definition_new_lowangle.xml