Migrate disks to quay.io

[cgwalters]

We landed a PR to build disk images which pushes to ghcr.io and not quay.io, because quay.io is rejecting our pushes:

$ oras push --debug --registry-config ~/.config/containers/auth.json --export-manifest out.json quay.io/cgwalters/bootc-cloud-image image.yaml                                                                                01/02/24 13:11:25 PM
DEBU[0000]  Request URL: "https://quay.io/v2/cgwalters/bootc-cloud-image/manifests/sha256:0ed566dfce61edc2eba10b167d7ddeb238b00ff51010cce0042ef2471334a6c0" 
DEBU[0000]  Request method: "HEAD"                      
DEBU[0000]  Request headers:                            
DEBU[0000]    "Accept": "application/vnd.docker.distribution.manifest.v2+json, application/vnd.docker.distribution.manifest.list.v2+json, application/vnd.oci.image.manifest.v1+json, application/vnd.oci.image.index.v1+json, application/vnd.oci.artifact.manifest.v1+json" 
DEBU[0000]    "User-Agent": "oras/0.15.0+unreleased"    
DEBU[0000]  Response Status: "404 Not Found"            
DEBU[0000]  Response headers:                           
DEBU[0000]    "Vary": "Cookie"                          
DEBU[0000]    "Date": "Tue, 02 Jan 2024 18:11:25 GMT"   
DEBU[0000]    "Content-Type": "application/json"        
DEBU[0000]    "Content-Length": "82"                    
DEBU[0000]    "Server": "nginx/1.20.1"                  
DEBU[0000]  Request URL: "https://quay.io/v2/cgwalters/bootc-cloud-image/blobs/sha256:ca3d163bab055381827226140568f3bef7eaac187cebd76878e0b63e9e442356" 
DEBU[0000]  Request method: "HEAD"                      
DEBU[0000]  Request headers:                            
DEBU[0000]    "User-Agent": "oras/0.15.0+unreleased"    
DEBU[0000]  Response Status: "200 OK"                   
DEBU[0000]  Response headers:                           
DEBU[0000]    "Docker-Content-Digest": "sha256:ca3d163bab055381827226140568f3bef7eaac187cebd76878e0b63e9e442356" 
DEBU[0000]    "Cache-Control": "max-age=31436000"       
DEBU[0000]    "X-Frame-Options": "DENY"                 
DEBU[0000]    "Strict-Transport-Security": "max-age=63072000; preload" 
DEBU[0000]    "Server": "nginx/1.20.1"                  
DEBU[0000]    "Content-Type": "application/octet-stream" 
DEBU[0000]    "Content-Length": "3"                     
DEBU[0000]    "Vary": "Cookie"                          
DEBU[0000]    "Date": "Tue, 02 Jan 2024 18:11:25 GMT"   
Exists    ca3d163bab05 image.yaml
DEBU[0000]  Request URL: "https://quay.io/v2/cgwalters/bootc-cloud-image/manifests/sha256:0ed566dfce61edc2eba10b167d7ddeb238b00ff51010cce0042ef2471334a6c0" 
DEBU[0000]  Request method: "PUT"                       
DEBU[0000]  Request headers:                            
DEBU[0000]    "Content-Type": "application/vnd.oci.artifact.manifest.v1+json" 
DEBU[0000]    "User-Agent": "oras/0.15.0+unreleased"    
DEBU[0000]  Response Status: "415 Unsupported Media Type" 
DEBU[0000]  Response headers:                           
DEBU[0000]    "Date": "Tue, 02 Jan 2024 18:11:26 GMT"   
DEBU[0000]    "Content-Type": "application/json"        
DEBU[0000]    "Content-Length": "131"                   
DEBU[0000]    "Server": "nginx/1.20.1"                  
DEBU[0000]    "Vary": "Cookie"                          
Error: PUT "https://quay.io/v2/cgwalters/bootc-cloud-image/manifests/sha256:0ed566dfce61edc2eba10b167d7ddeb238b00ff51010cce0042ef2471334a6c0": response status code 415: manifest invalid: manifest invalid: map[message:manifest schema version not supported]
$

This issue tracks work necessary to fix this to move to quay.io for consistency. According to internal chat the quay team says they have dropped the allowlist for the public quay.io instance, but the exact same command works with ghcr.io but is rejected by quay.io here.