kernel-clk6.12: fix duplicate Obsoletes - move to metapackages only

Fixes issue where both kernel-core and kernel-debug-core were obsoleting
the 'kernel' metapackage, causing DNF conflicts.

Changes:
- Removed 'Obsoletes: kernel = ...' from kernel_reqprovconf macro
- Added 'Obsoletes: kernel = ...' to base metapackage (kernel-clk6.12)
- Added 'Obsoletes: kernel-%{1} = ...' to kernel_meta_package macro
  for variants (kernel-clk6.12-debug, etc.)

Now each old package is obsoleted by exactly one new package:
- kernel → kernel-clk6.12
- kernel-core → kernel-clk6.12-core
- kernel-debug → kernel-clk6.12-debug
- kernel-debug-core → kernel-clk6.12-debug-core

Author: bmastbergen

ciq/SPECS/kernel-clk6.12.spec

@@ -1045,6 +1045,13 @@ Patch999999: linux-kernel-test.patch
 
 # END OF PATCH DEFINITIONS
 
+Obsoletes: kernel = 6.12.15
+Obsoletes: kernel = 6.12.30
+Obsoletes: kernel = 6.12.43
+Obsoletes: kernel = 6.12.63
+Obsoletes: kernel = 6.12.74
+Obsoletes: kernel = 6.12.77
+
 %description
 The kernel meta package
 
@@ -1058,12 +1065,6 @@ The kernel meta package
 %if %{-o:0}%{!-o:1}\
 Provides: kernel = %{specversion}-%{pkg_release}\
 Provides: %{name} = %{specversion}-%{pkg_release}\
-Obsoletes: kernel = 6.12.15\
-Obsoletes: kernel = 6.12.30\
-Obsoletes: kernel = 6.12.43\
-Obsoletes: kernel = 6.12.63\
-Obsoletes: kernel = 6.12.74\
-Obsoletes: kernel = 6.12.77\
 %endif\
 Provides: %{name}-%{_target_cpu} = %{specversion}-%{pkg_release}%{uname_suffix %{?1:+%{1}}}\
 Provides: %{name}-uname-r = %{KVERREL}%{uname_suffix %{?1:+%{1}}}\
@@ -1679,6 +1680,12 @@ Requires: %{name}-%{1}-modules-core-uname-r = %{KVERREL}%{uname_suffix %{1}}\
 Requires: realtime-setup\
 %endif\
 Provides: installonlypkg(kernel)\
+Obsoletes: kernel-%{1} = 6.12.15\
+Obsoletes: kernel-%{1} = 6.12.30\
+Obsoletes: kernel-%{1} = 6.12.43\
+Obsoletes: kernel-%{1} = 6.12.63\
+Obsoletes: kernel-%{1} = 6.12.74\
+Obsoletes: kernel-%{1} = 6.12.77\
 %description %{1}\
 The meta-package for the %{1} kernel\
 %{nil}