specgen,run: support running container from valid manifest list

Following PR adds support for running containers from a manifest list
present on localstorage. Before this PR podman only supports running
containers from valid images but not from manifest list.

So `podman run -it --platform <some> <manifest-list> command` should
become functional now and users should be able to resolve images on the
bases of provided `--platform` string.

Example
```
podman manifest create test
podman build --platform linux/amd64,linux/arm64 --manifest test .
podman run --rm --platform linux/arm64/v8 test uname -a
```

Closes: https://github.com/containers/podman/issues/14773

Signed-off-by: Aditya R <arajan@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/pkg/specgen/specgen.go b/pkg/specgen/specgen.go
index 79e20667b..42b89ece1 100644
--- a/pkg/specgen/specgen.go
+++ b/pkg/specgen/specgen.go
@@ -103,6 +103,12 @@ type ContainerBasicConfig struct {
 	// RawImageName is the user-specified and unprocessed input referring
 	// to a local or a remote image.
 	RawImageName string `json:"raw_image_name,omitempty"`
+	// ImageOS is the user-specified image OS
+	ImageOS string `json:"image_os,omitempty"`
+	// ImageArch is the user-specified image architecture
+	ImageArch string `json:"image_arch,omitempty"`
+	// ImageVariant is the user-specified image variant
+	ImageVariant string `json:"image_variant,omitempty"`
 	// RestartPolicy is the container's restart policy - an action which
 	// will be taken when the container exits.
 	// If not given, the default policy, which does nothing, will be used.