tests: fix ProtoBuf breaking detection to be wire-only (#532)

our spec describes how data models look in data transfers.
current protobuf breaking detection adheres this.

the protobuf breaking detection also does unnecessary detections, which
should not matter for our domain.
they are removed, here.

----


changes are based on
#530 (comment)

---------

Signed-off-by: Jan Kowalleck <[email protected]>

Author: jkowalleck

tools/src/test/proto/buf_breaking-remote.yaml

@@ -3,5 +3,4 @@
 version: v1
 breaking:  # https://buf.build/docs/configuration/v1/buf-yaml#breaking
   use:  # see https://buf.build/docs/breaking/overview#rules-and-categories
-    - FILE
-    - WIRE_JSON
+    - WIRE

tools/src/test/proto/buf_breaking-version.yaml

@@ -3,8 +3,7 @@
 version: v1
 breaking:  # https://buf.build/docs/configuration/v1/buf-yaml#breaking
   use:  # see https://buf.build/docs/breaking/overview#rules-and-categories
-    - FILE
-    - WIRE_JSON
+    - WIRE
   except:
     # scope is to detect changes from one version to the other -> so ignore "FILE_SAME_PACKAGE"
     - FILE_SAME_PACKAGE

tools/src/test/proto/test.sh

@@ -69,7 +69,7 @@ function schema-breaking-version () {
   }
 
   compare '1.6' '1.5'
-  echo '>> skip compare' '1.5' '1.4' >&2  # <-- had breaking changes, which is acknowledged
+  compare '1.5' '1.4'
   compare '1.4' '1.3'
 
   echo '>> OK.' >&2