arpack-ng: YAML config and rel.stage changed to stable

Compiler/impi/files/config.yaml

@@ -0,0 +1,23 @@
+---
+# yamllint disable rule:line-length
+format: 1
+impi:
+  defaults:
+    group: Compiler
+    overlay: base
+    relstage: stable
+    build_functions:
+      prep: []
+      configure: []
+      compile: []
+      install: []
+
+  versions:
+    22.2:
+      variants:
+        - systems: [merlin-.*\.psi.ch]
+          relstage: stable
+          group_deps:
+            compiler:
+              intel: [22.2]
+

Compiler/impi/files/variants.rhel6

@@ -1,16 +0,0 @@
-impi/5.0        deprecated	intel/15.2
-impi/5.0        deprecated	intel/15.3
-impi/5.1        deprecated	intel/16.1
-impi/5.1        deprecated	intel/16.2
-impi/5.1        deprecated	intel/16.3
-impi/5.1        deprecated	intel/17.1
-impi/17.8       deprecated	intel/17.8
-impi/18.2       deprecated	intel/18.2
-impi/18.3       deprecated	intel/18.3
-impi/18.4       deprecated	intel/18.4
-impi/19.3       deprecated	intel/19.3
-impi/19.4	deprecated	intel/19.4
-impi/20.4	stable	        intel/20.4
-impi/21.4	stable	        intel/21.4
-impi/22.1	stable	        intel/22.1
-impi/22.2	unstable	intel/22.2