download: Support for gvisor (part 2)

Gvisor releases, besides only being tags, have some particularities:
- they are of the form yyyymmdd.p -> this get interpreted as a yaml
  float, so we need to explicitely convert to string to make it work.
- there is no semver-like attached to the version numbers, but the API
  (= OCI container runtime interface) is expected to be stable (see
  linked discussion)
- some older tags don't have hashs for some archs

Link: https://groups.google.com/g/gvisor-users/c/SxMeHt0Yb6Y/m/Xtv7seULCAAJ

scripts/download_hash.py

@@ -239,17 +239,22 @@ def download_hash(only_downloads: [str]) -> None:
     new_versions = {
             c:
             {v for v in github_versions[c]
-                    if any(v > version and (v.major, v.minor) == (version.major, version.minor)
-                           for version in [max(minors) for _, minors in groupby(cur_v, lambda v: (v.minor, v.major))])
+                 if any(v > version
+                        and (
+                            (v.major, v.minor) == (version.major, version.minor)
+                            or c.startswith('gvisor')
+                            )
+                           for version in [max(minors) for _, minors in groupby(cur_v, lambda v: (v.minor, v.major))]
+                        )
                         # only get:
-                           # - patch versions (no minor or major bump)
+                        # - patch versions (no minor or major bump) (exception for gvisor which does not have a major.minor.patch scheme
                         # - newer ones (don't get old patch version)
             }
             - set(cur_v)
             for component, archs in data.items()
             if (c := component.removesuffix('_checksums')) in downloads.keys()
             # this is only to bound cur_v in the scope
-            and (cur_v := sorted(Version(k) for k in next(archs.values().__iter__()).keys()))
+            and (cur_v := sorted(Version(str(k)) for k in next(archs.values().__iter__()).keys()))
         }
 
     def get_hash(component: str, version: Version, arch: str):
@@ -280,7 +285,7 @@ def download_hash(only_downloads: [str]) -> None:
         data[c] = {arch :
                    {v :
                     versions[v] for v in sorted(versions.keys(),
-                                                key=Version,
+                                                key=lambda v: Version(str(v)),
                                                 reverse=True)
                     }
                    for arch, versions in data[c].items()

scripts/list_releases.graphql

@@ -19,7 +19,7 @@ query($repoWithReleases: [ID!]!, $repoWithTags: [ID!]!) {
 
     ... on Repository {
       nameWithOwner
-      refs(refPrefix: "refs/tags/", last: 100) {
+      refs(refPrefix: "refs/tags/", last: 25) {
         nodes {
           name
         }