refactor(.github/workflows): reorganize many builds (#332)

1. reduce the number of periodic builds

2. just build as part of the release process in most cases

3. shorttests duplicates coverage

Preliminary changes as part of https://github.com/ooni/probe/issues/1466

.github/workflows/codeql-analysis.yml

@@ -1,3 +1,5 @@
+# CodeQL runs a CodeQL scan.
+#
 # For most projects, this workflow file will not need changing; you simply need
 # to commit it to your repository.
 #
@@ -7,12 +9,7 @@ name: "CodeQL"
 
 on:
   push:
-    branches: [ master, 'release/**' ]
-  pull_request:
-    # The branches below must be a subset of the branches above
-    branches: [ master ]
-  schedule:
-    - cron: '35 10 * * 1'
+    branches: [ "release/**" ]
 
 jobs:
   analyze:
@@ -22,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        language: [ 'go' ]
+        language: [ "go" ]
 
     steps:
     - name: Checkout repository