fix: #3311669 Process ignored words before punctuation replacement

Frank Mablyrequested to merge
issue/pathauto-3311669:3311669-punctuation-processed-before into 8.x-1.x

Move ignored words removal before punctuation replacement in cleanString() so that words adjacent to punctuation (e.g. "d" in "d'admission") are matched by \b word boundaries and correctly removed.

Closes #3311669

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