rename extension-release.[c|h] -> extension-util.[c|h]

It will be used for other extension DDI validation, not just for extension-release
validation

src/core/namespace.c

@@ -18,7 +18,7 @@
 #include "devnum-util.h"
 #include "env-util.h"
 #include "escape.h"
-#include "extension-release.h"
+#include "extension-util.h"
 #include "fd-util.h"
 #include "format-util.h"
 #include "glyph-util.h"

src/portable/portable.c

@@ -16,7 +16,7 @@
 #include "env-util.h"
 #include "errno-list.h"
 #include "escape.h"
-#include "extension-release.h"
+#include "extension-util.h"
 #include "fd-util.h"
 #include "fileio.h"
 #include "fs-util.h"

src/shared/dissect-image.c

@@ -39,7 +39,7 @@
 #include "dm-util.h"
 #include "env-file.h"
 #include "env-util.h"
-#include "extension-release.h"
+#include "extension-util.h"
 #include "fd-util.h"
 #include "fileio.h"
 #include "fs-util.h"

src/shared/extension-util.c

@@ -3,7 +3,7 @@
 #include "alloc-util.h"
 #include "architecture.h"
 #include "env-util.h"
-#include "extension-release.h"
+#include "extension-util.h"
 #include "log.h"
 #include "os-util.h"
 #include "strv.h"

src/shared/meson.build

@@ -64,7 +64,7 @@ shared_sources = files(
         'ethtool-util.c',
         'exec-util.c',
         'exit-status.c',
-        'extension-release.c',
+        'extension-util.c',
         'fdset.c',
         'fileio-label.c',
         'find-esp.c',

src/sysext/sysext.c

@@ -15,7 +15,7 @@
 #include "dissect-image.h"
 #include "env-util.h"
 #include "escape.h"
-#include "extension-release.h"
+#include "extension-util.h"
 #include "fd-util.h"
 #include "fileio.h"
 #include "format-table.h"