[ci] scripts: don't rebuild for every pallet benchmark (#5126)

* scripts: don't rebuild for every pallet benchmark

* ci: remove orphan variable

* [ci] run_benches_for_runtime.sh: explicit relative path names

* [ci] scripts: handle failing benchmarks

polkadot/.gitlab-ci.yml

@@ -514,13 +514,12 @@ update_polkadot_weights:           &update-weights
   stage:                           stage2
   when:                            manual
   variables:
-    PROFILE:                       production
     RUNTIME:                       polkadot
   artifacts:
     paths:
       - ${RUNTIME}_weights_${CI_COMMIT_SHORT_SHA}.patch
   script:
-    - ./scripts/run_benches_for_runtime.sh $RUNTIME $PROFILE
+    - ./scripts/run_benches_for_runtime.sh $RUNTIME
     - git diff -P > ${RUNTIME}_weights_${CI_COMMIT_SHORT_SHA}.patch
   # uses the "shell" executors
   tags:
@@ -529,13 +528,11 @@ update_polkadot_weights:           &update-weights
 update_kusama_weights:
   <<:                              *update-weights
   variables:
-    PROFILE:                       production
     RUNTIME:                       kusama
 
 update_westend_weights:
   <<:                              *update-weights
   variables:
-    PROFILE:                       production
     RUNTIME:                       westend
 
 #### stage:                        stage3