cmd/go: populate module info even if an error occurs in loading package

[unbyte]

The existing implementation ignores module info if there is any error loading the package.

Fixes #44287

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Patch Set 2: Run-TryBot+1 Code-Review+2

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Patch Set 2:

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Patch Set 2: -Code-Review

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Patch Set 2: TryBot-Result-1

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Patch Set 5:

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/comments off