fix: move image hardlink handling upstream during image indexing (#5196)

* chore(deps): pin stereoscope to the hardlink-inode-adoption branch

temporary pin to anchore/stereoscope#670 so the hardlink changes can be
exercised end to end. needs re-pinning to a release tag before merge.

pulls transitive bumps along with it: docker/cli, docker/go-connections and
gabriel-vasile/mimetype.

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* fix: drop the image resolver hardlink workaround

stereoscope now adopts a hardlink's target at index time, so a hardlinked name
arrives already described as a regular file with the target's size, mime type
and content. the resolver-side fix from #5029 sat on top of that doing the same
job a second time, gated on a file type that no longer shows up, so both
`resolveHardLinkTarget` implementations and the extra tree walk they cost on
every `FilesByPath` are gone.

`file.NewVirtualLocationFromImage` stays as-is. it is exported and syft is v1,
so it keeps working for anyone using it, it just has no callers in syft now.

this picks up `FilesByMIMEType`, which #5029 explicitly could not fix, so
hardlinked names now reach mime-driven catalogers. on images built around
multi-call binaries (busybox and friends) that is a lot more file and executable
entries than before; distro and toolchain images move by about one entry.

one shape regresses: a hardlink stereoscope could not adopt (a link name that is
absent, empty, names a directory, names another un-adopted link, or points into
a lower layer) keeps `TypeHardLink`, and syft goes back to collapsing it onto
its target's path. no mainstream builder emits the cross-layer case.

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* bump stereoscope to main

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

---------

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

go.sum

@@ -146,8 +146,8 @@ github.com/anchore/go-version v1.2.2-0.20200701162849-18adb9c92b9b h1:e1bmaoJfZV
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