Rust: Update DotDotCheck to use getCanonicalPath

[geoffw0]

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Update DotDotCheck to use getCanonicalPath rather than getResolvedPath.

This is not working because (1) we're not finding the static targets of these method calls (presumably because type inference is not quite getting there) and (2) I've been unable to test effectively due to (1), so I'm not even sure the model I've written is correct. I should be able to finish this when type inference is working better in other places, e.g. https://github.com/github/codeql/pull/19802 .