tests: update gating configuration

Related: RHELTEST-2946

gating.yaml

@@ -1,7 +0,0 @@
---- !Policy
-product_versions:
-  - rhel-8
-decision_context: osci_compose_gate
-rules:
-  - !PassingTestCaseRule {test_case_name: osci.brew-build.tier0.functional}
-

plans/tier1.fmf

@@ -3,19 +3,24 @@
 summary: Tier1 plan for mksh
 
 discover:
-  - how: fmf
+  - name: Internal gating tests plan (bash)
+    how: fmf
     filter: 'tag: CI-Tier-1 & component: mksh'
     url: https://pkgs.devel.redhat.com/git/tests/bash
-  - how: fmf
+  - name: Internal gating tests plan (dash)
+    how: fmf
     filter: 'tag: CI-Tier-1 & component: mksh'
     url: https://pkgs.devel.redhat.com/git/tests/dash
-  - how: fmf
+  - name: Internal gating tests plan (ksh)
+    how: fmf
     filter: 'tag: CI-Tier-1 & component: mksh'
     url: https://pkgs.devel.redhat.com/git/tests/ksh
-  - how: fmf
+  - name: Internal gating tests plan (mksh)
+    how: fmf
     filter: 'tag: CI-Tier-1 & component: mksh'
     url: https://pkgs.devel.redhat.com/git/tests/mksh
-  - how: fmf
+  - name: Internal gating tests plan (zsh)
+    how: fmf
     filter: 'tag: CI-Tier-1 & component: mksh'
     url: https://pkgs.devel.redhat.com/git/tests/zsh