github: set workflow trigger conditions

Author: nkanaev

.github/workflows/build.yml

@@ -1,6 +1,10 @@
 name: Build
 
 on:
+  push:
+    tags:
+      - v*
+  workflow_dispatch:
   workflow_run:
     workflows: [Test]
     types:

.github/workflows/test.yml

@@ -1,12 +1,6 @@
 name: Test
 
-on:
-  push:
-    branches:
-      - master
-  pull_request:
-    branches:
-      - '*'
+on: push
 
 jobs:
   test: