Remove deprecated SLES builds

- Remove SLES 15.2 and 15.3 from CI
+ Add SLES 15.6 to CI

Signed-off-by: Russell McGuire <russell.w.mcguire@intel.com>

Author: rwmcguir

.github/workflows/build-multi-static.yml

@@ -50,9 +50,8 @@ jobs:
           {name: ubuntu, vmaj: 20, vmin: '04'},
           {name: ubuntu, vmaj: 22, vmin: '04'},
           {name: ubuntu, vmaj: 24, vmin: '04'},
-          {name: sles, vmaj: 15, vmin: 2},
-          {name: sles, vmaj: 15, vmin: 3},
           {name: sles, vmaj: 15, vmin: 4},
+          {name: sles, vmaj: 15, vmin: 6},
           {name: rhel, vmaj: 8, vmin: 6},
           {name: windows}
         ]

.github/workflows/build-multi.yml

@@ -65,9 +65,8 @@ jobs:
           {name: ubuntu, vmaj: 20, vmin: '04'},
           {name: ubuntu, vmaj: 22, vmin: '04'},
           {name: ubuntu, vmaj: 24, vmin: '04'},
-          {name: sles, vmaj: 15, vmin: 2},
-          {name: sles, vmaj: 15, vmin: 3},
           {name: sles, vmaj: 15, vmin: 4},
+          {name: sles, vmaj: 15, vmin: 6},
           {name: rhel, vmaj: 8, vmin: 6},
           {name: windows}
         ]