`install.goreleaser.com` is now deprecated and stopped working so the tests
in new PRs are failing.

🐛 ci: fix golangci-lint installation

* crdgen: compare metav1 pkg by ID & fsp loader

This patch updates the way the CRD generator compares an imported
metav1 package. Previously the comparison occurred using a Golang
equality operator, !=, against two, in-memory data structures.
However, this fails when multiple root paths are loaded. Their
metav1 packages are identical, just not identical objects in
memory. This patch updates the comparison to compare the package
IDs, not the instance of the object.

This patch also introduces a filesystem-path specific loader for
each unique filesystem path provided as a root. This ensures the
AST is loaded correctly and the kubebuilder markers are parsed as
intended.

* Reproduce the issue

This patch adds tests to reproduce the issue of the markers
not being discovered when multiple paths are used.

The issue is not markers missing from a type, but markers missing
from a *referenced* type. For example, the new Job type imports
the unserved.CronJobSpec as the field Job.Spec.CronJob. The
markers are not generated for Job.Spec.CronJob as it is referenced
from another package.

This patch simplifies the LoadRootsWithConfig logic to be closer
to the logic that existed prior to the patch that addressed support
for multiple, distinct root paths. The fix that was merged was
overly complex, and not necessarily so. This update simplifies
that patch to the necessary bits.

Signed-off-by: Charles-Edouard Brétéché <charled.breteche@gmail.com>

…x-for-680

🏃 Simplify the LoadRootsWithConfig logic

* 🐛 crd/gen: Sort findGroupKinds

* remove binary

✨  Upgrade the yaml from v3.0.0-20210107192922-496545a6307b to 3.0.0

🐛 Allow setting PreserveUnknownFields at both type and field level

…#683)

* Add XPreserveUnknownFields to runtime.RawExtension

Signed-off-by: Charles-Edouard Brétéché <charled.breteche@gmail.com>

* fix: tests

Signed-off-by: Charles-Edouard Brétéché <charled.breteche@gmail.com>

* fix: generate crd manifests

Signed-off-by: Charles-Edouard Brétéché <charled.breteche@gmail.com>

…kers-to-type

🐛 Make topology markers also valid for type definitions

Bug was introduced in kubernetes-sigs#693.

…Flatten

🐛 Fix crd flattening for structType marker to not create duplicate entries for XMapType

🐛 Allow setting PreserveUnknownFields at both type and field level

Signed-off-by: Charles-Edouard Brétéché <charled.breteche@gmail.com>

…roller-tools into release-0.9

Signed-off-by: Charles-Edouard Brétéché <charled.breteche@gmail.com>