This is an extension of the mitigations introduced in #455.
Unfortunately, the original mitigations didn't address the primary cause
of ambiguous import errors: the github.com/Azure/go-autorest module.

The issue stems from the fact that old versions of the root module
(github.com/Azure/go-autorest) provide the same packages as the newer
submodules.

To correct this situation, the _root module_ needs to be upgraded to a
version that no longer provides those packages (a version where the
submodules are present). Fortunately, the submodules can be leveraged to
provide the necessary version bump.

See: #414 (comment)

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Caveat: in order for this to work, an importable version of the root
package needs to be referenceable.

PR #527 makes the root package importable.

The go.mod files assume that this importable version will be
referenceable as v14.2.0. If the version where the importable package is
available ends up being different, these files will need to be updated.

See also: #395, #413, #414, #455, #481, #524