Revert "zfs: dynamically determine latestCompatibleLinuxPackages"

This reverts commit 27b52ad.

Fixes #341867

We could select linux_6_10 now if we wanted but I opted for linux_6_6 instead
because this will be removed anyways.

This is technically a breaking change but latestCompatibleLinuxPackages has no
expectancy of stability in the first place.

pkgs/os-specific/linux/zfs/2_1.nix

@@ -1,6 +1,7 @@
 { callPackage
 , kernel ? null
 , stdenv
+, linuxKernel
 , lib
 , nixosTests
 , ...
@@ -14,7 +15,9 @@ callPackage ./generic.nix args {
   # this attribute is the correct one for this package.
   kernelModuleAttribute = "zfs_2_1";
   # check the release notes for compatible kernels
-  kernelCompatible = kernel: kernel.kernelOlder "6.8";
+  kernelCompatible = kernel.kernelOlder "6.8";
+
+  latestCompatibleLinuxPackages = linuxKernel.packages.linux_6_6;
 
   # This is a fixed version to the 2.1.x series, move only
   # if the 2.1.x series moves.

pkgs/os-specific/linux/zfs/2_2.nix

@@ -2,6 +2,7 @@
 , kernel ? null
 , stdenv
 , lib
+, linuxKernel
 , nixosTests
 , ...
 } @ args:
@@ -14,7 +15,9 @@ callPackage ./generic.nix args {
   # this attribute is the correct one for this package.
   kernelModuleAttribute = "zfs_2_2";
   # check the release notes for compatible kernels
-  kernelCompatible = kernel: kernel.kernelOlder "6.11";
+  kernelCompatible = kernel.kernelOlder "6.11";
+
+  latestCompatibleLinuxPackages = linuxKernel.packages.linux_6_6;
 
   # this package should point to the latest release.
   version = "2.2.6";

pkgs/os-specific/linux/zfs/generic.nix

@@ -2,7 +2,6 @@ let
   genericBuild =
   { pkgs, lib, stdenv, fetchFromGitHub, fetchpatch
   , autoreconfHook269, util-linux, nukeReferences, coreutils
-  , linuxKernel
   , perl
   , configFile ? "all"
 
@@ -28,6 +27,7 @@ let
   , kernelModuleAttribute
   , extraPatches ? []
   , rev ? "zfs-${version}"
+  , latestCompatibleLinuxPackages
   , kernelCompatible ? null
   , maintainers ? (with lib.maintainers; [ amarshall ])
   , tests
@@ -200,13 +200,7 @@ let
     outputs = [ "out" ] ++ optionals buildUser [ "dev" ];
 
     passthru = {
-      inherit enableMail kernelModuleAttribute;
-      latestCompatibleLinuxPackages = lib.pipe linuxKernel.packages [
-        builtins.attrValues
-        (builtins.filter (kPkgs: (builtins.tryEval kPkgs).success && kPkgs ? kernel && kPkgs.kernel.pname == "linux" && kernelCompatible kPkgs.kernel))
-        (builtins.sort (a: b: (lib.versionOlder a.kernel.version b.kernel.version)))
-        lib.last
-      ];
+      inherit enableMail latestCompatibleLinuxPackages kernelModuleAttribute;
       # The corresponding userspace tools to this instantiation
       # of the ZFS package set.
       userspaceTools = genericBuild (outerArgs // {
@@ -243,7 +237,7 @@ let
       mainProgram = "zfs";
       # If your Linux kernel version is not yet supported by zfs, try zfs_unstable.
       # On NixOS set the option `boot.zfs.package = pkgs.zfs_unstable`.
-      broken = buildKernel && (kernelCompatible != null) && !(kernelCompatible kernel);
+      broken = buildKernel && (kernelCompatible != null) && !kernelCompatible;
     };
   };
 in

pkgs/os-specific/linux/zfs/unstable.nix

@@ -1,6 +1,7 @@
 { callPackage
 , kernel ? null
 , stdenv
+, linuxKernel
 , nixosTests
 , ...
 } @ args:
@@ -13,7 +14,9 @@ callPackage ./generic.nix args {
   # this attribute is the correct one for this package.
   kernelModuleAttribute = "zfs_unstable";
   # check the release notes for compatible kernels
-  kernelCompatible = kernel: kernel.kernelOlder "6.11";
+  kernelCompatible = kernel.kernelOlder "6.11";
+
+  latestCompatibleLinuxPackages = linuxKernel.packages.linux_6_10;
 
   # this package should point to a version / git revision compatible with the latest kernel release
   # IMPORTANT: Always use a tagged release candidate or commits from the