Rollup merge of #58381 - davidtwco:issue-42944, r=estebank

Only suggest imports if not imported.

Fixes #42944 and fixes #53430.

This commit modifies name resolution error reporting so that if a name
is in scope and has been imported then we do not suggest importing it.

This can occur when we add a label about constructors not being visible
due to private fields. In these cases, we know that the struct/variant
has been imported and we should silence any suggestions to import the
struct/variant.

r? @estebank

0 files changed, 0 insertions, 0 deletions