Replace syslog exporter with syslog exporter from opentelemetry-collector-contrib

[kkujawa-sumo]

Syslog exporter which is in this repository should be replaced with syslog exporter from opentelemetry-collector-contrib.

Configuration options in syslog exporter from opentelemetry-collector-contrib are different and slightly different code.

syslog exporter from opentelemetry-collector-contrib has development stability, to move this exporter to alpha following tasks needs to be done:

• [exporter/syslog] Add integration tests open-telemetry/opentelemetry-collector-contrib#21245
• [exporter/syslog] Performance improvements open-telemetry/opentelemetry-collector-contrib#21244
• [exporter/syslog] Improve documentation open-telemetry/opentelemetry-collector-contrib#21242

[kkujawa-sumo]

Example configuration for sumologic version of syslog exporter:

  syslog:
    protocol: tcp
    port: 514
    endpoint: 127.0.0.1
    format: rfc5424
    tls:
      ca_file: ca.pem
      cert_file: cert.pem
      key_file: key.pem

Example configuration for upstream version of syslog exporter:

  syslog:
    network: tcp
    port: 514
    endpoint: 127.0.0.1
    protocol: rfc5424
    tls:
      ca_file: ca.pem
      cert_file: cert.pem
      key_file:  key.pem

so to switch to upstream version of syslog exporter it is necessary to replace:

• protocol key with networkkey
• format key with protocol key

ref: open-telemetry/opentelemetry-collector-contrib#19647 (comment)

[kkujawa-sumo]

Syslog exporter will be available in v0.89 release of opentelemetry-collector-contrib, related pull request: open-telemetry/opentelemetry-collector-contrib#28902