Temporarily disable linux runners on github actions.

Author: arobenko

.github/workflows/actions_build.yml

@@ -9,6 +9,7 @@ on:
 
 jobs:
   build_gcc_ubuntu_22_04:
+    if: false
     runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
@@ -50,6 +51,7 @@ jobs:
       run: ctest -V 
 
   build_gcc_ubuntu_24_04:
+    if: false
     runs-on: ubuntu-24.04
     strategy:
       fail-fast: false
@@ -99,6 +101,7 @@ jobs:
       run: make doc_comms       
 
   build_clang_ubuntu_22_04:
+    if: false
     runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
@@ -140,6 +143,7 @@ jobs:
       run: ctest -V 
 
   build_clang_ubuntu_24_04:
+    if: false
     runs-on: ubuntu-24.04
     strategy:
       fail-fast: false