ci: update CodeQL workflow to only analyze daemon

Agent build stopped working because build environment used by CodeQL misses
agent's build dependencies (libpcre3-dev). Disabling for now.

Author: lavarou

.github/workflows/codeql.yml

@@ -29,7 +29,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        language: [ 'c-cpp', 'go' ]
+        language: [ 'go' ]
         # Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
 
     steps: