JSON syslog output very high CPU percentage

[lsayanes]

Related issue
#18471

Description

This PR fixes high CPU usage of 100-90% when setting JSON syslog_output

Fix:
just wait when there is nothing to send in src/os_csyslogd/csyslogd.c:

        if (al_data == NULL && json_data == NULL) { 
            sleep(1);
        }

Configuration example

<syslog_output>
    <server>10.211.55.7</server>
    <level>7</level>
    <format>json</format>
</syslog_output>

Tests

• Compilation without warnings in every supported platform
  • Linux
  • Windows
  • MAC OS X
• Source installation
• Package installation
• Source upgrade
• Package upgrade
• Review logs syntax and correct language
• QA templates contemplate the added capabilities

• Memory tests for Linux
  • Scan-build report
  • Coverity
  • Valgrind (memcheck and descriptor leaks check)
  • Dr. Memory
  • AddressSanitizer
• Memory tests for Windows
  • Scan-build report
  • Coverity
  • Dr. Memory
• Memory tests for macOS
  • Scan-build report
  • Leaks
  • AddressSanitizer

• Retrocompatibility with older Wazuh versions
• Working on cluster environments
• Configuration on demand reports new parameters
• The data flow works as expected (agent-manager-api-app)
• Added unit tests (for new features)
• Stress test for affected components

• Decoder/Rule tests
  • Added unit testing files ".ini"
  • runtests.py executed without errors