godoc/static: Update subrepo tour links

[crisman]

The tour links under Sub-repositories on the main page of the godoc server are pointing at the old module (outside of x/website) and the old (pre go.dev) public URL. Should be updated to match the new homes of the tour.

Update packageroot.html to point at the new tour package doc in x/website/tour and generate the godoc static content.

Fixes golang/go#59505

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Message from qiulaidongfeng:

Patch Set 1: Run-TryBot+1

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Patch Set 1:

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Patch Set 1: TryBot-Result-1

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