Collector pods can't forward logs to Splunk due to weak CA certificate key in RHOCP 4

Issue

• Collector pods can't send logs to Splunk when CA certificate key is weak.

• Collector pods stream below logs:

  2023-03-30T18:57:05.749071Z ERROR vector::internal_events::http_client: HTTP error. error=error trying to connect: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1915:: CA certificate key too weak error_type="request_failed" stage="processing"
  2023-03-30T18:57:05.749150Z ERROR vector::topology::builder: msg="Healthcheck: Failed Reason." error=Failed to make HTTP(S) request: error trying to connect: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1915:: CA certificate key too weak component_kind="sink" component_type="splunk_hec" component_id=splunk_receiver component_name=splunk_receiver