By Tom Westbrook SINGAPORE (Reuters) – The euro tumbled to a fresh 22-month low on the dollar while commodity currencies were swept to multi-month peaks as war in Ukraine sent oil prices spiking and stoked fears of a stagflationary shock that could hammer Europe. The euro fell as much as 1% to $1.0822 in Asia trade, its lowest since May 2020. It is down more than 4% since Russia began what it calls a “special military operation” in Ukraine and is not far from testing its 2020 trough of $1.0636. It also fell below one Swiss franc for the first time since the Swiss quit their euro peg in 2015, h…

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