Relax the jtreg7 dependency constraint to permit '~usN' versions

This came up while building openjdk-17 on jammy, focal and bionic. The version constraint (>= 7.3.1+1-0~) fails for valid Ubuntu specific versions like 7.3.1+1~us2-0ubuntu1 which represent the same base upstream version (7.3.1+1) as in 7.3.1+1-0.

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