Temporarily disable linux runners on github actions.

Author: arobenko

.github/workflows/actions_build.yml

@@ -16,6 +16,7 @@ env:
 
 jobs:
   build_gcc_ubuntu_24_04:
+    if: false
     runs-on: ubuntu-24.04
     strategy:
       fail-fast: false
@@ -91,6 +92,7 @@ jobs:
         VERBOSE: 1
 
   build_clang_ubuntu_22_04:
+    if: false
     runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
@@ -154,6 +156,7 @@ jobs:
         VERBOSE: 1
 
   build_clang_ubuntu_24_04:
+    if: false
     runs-on: ubuntu-24.04
     strategy:
       fail-fast: false