CI: improve logging for configure, build and install steps

* Line buffering for stdout and stderr to better preserve log order
 * Full log now contains both stdout and stderr to keep errors in context

.github/workflows/actions/linux/configure/action.yml

@@ -50,7 +50,8 @@ runs:
       id: configure
       shell: bash
       run: |
-        cmake -S ${{ inputs.sourcedir }} -B ${{ inputs.builddir }} -D CMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE ${{inputs.extraParameters }} > ${{ inputs.logFile }} 2> ${{ inputs.errorFile }}
+        (stdbuf -oL -eL cmake -S ${{ inputs.sourcedir }} -B ${{ inputs.builddir }} -D CMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE ${{inputs.extraParameters }}) \
+        2> >(tee -a ${{ inputs.errorFile }}) | tee -a ${{ inputs.logFile }}
     - name: Write report
       shell: bash
       if: always()
@@ -72,8 +73,3 @@ runs:
         echo '```' >> ${{ inputs.reportFile }}
         echo "</details>">> ${{ inputs.reportFile }}
         echo "" >> ${{ inputs.reportFile }}
-        # Print the Log to the console
-        cat ${{ inputs.errorFile }}
-        echo "::group::Configure Log"
-        cat ${{ inputs.logFile }}
-        echo "::endgroup::"