[tool] Fix missing-releases command again

Previous patch [1] added different regex for tarball and wheel name
formatting, but now both tarball and wheel files are using '_' instead
of '.' and '-' in package names.

NOTE(elod.illes): this command only works for 2025.2 Flamingo and gives
false negatives when checking old series' deliverables.

[1] I049e05b55ea851c7115b753dc0ece35c052b21b3

Change-Id: I75bfe122a6e1d943cec13d69fcdd679569ebc9f4
Signed-off-by: Előd Illés <elod.illes@est.tech>

openstack_releases/links.py

@@ -16,11 +16,7 @@ import re
 import requests
 
 
-def _format_wheel_name(name):
-    return re.sub(r"[-]+", "_", name).lower()
-
-
-def _format_tarball_name(name):
+def _format_name(name):
     return re.sub(r"[-.]+", "_", name).lower()
 
 
@@ -48,7 +44,7 @@ def tarball_url(version, project):
         s='https://tarballs.openstack.org',
         v=version,
         r=repo_base,
-        n=_format_tarball_name(base),
+        n=_format_name(base),
     )
 
 
@@ -59,7 +55,7 @@ def wheel_py3_url(version, project):
         s='https://tarballs.openstack.org',
         v=version,
         r=repo_base,
-        n=_format_wheel_name(base),
+        n=_format_name(base),
     )
 
 
@@ -70,7 +66,7 @@ def wheel_both_url(version, project):
         s='https://tarballs.openstack.org',
         v=version,
         r=repo_base,
-        n=_format_wheel_name(base),
+        n=_format_name(base),
     )