[Auditbeat]: Cleanup a couple of log messages formatters

[aleksmaus]

Proposed commit message

Cleanup a couple of log messages formatters.

Noticed a couple of wrong formatters in the log messages resulting in the messages like this:

{"log.level":"warn","@timestamp":"2024-07-25T16:15:25.261-0400","log.logger":"processor.add_session_metadata","log.origin":{"function":"github.com/elastic/beats/v7/x-pack/auditbeat/processors/sessionmd/provider/ebpf_provider.prvdr.SyncDB","file.name":"ebpf_provider/ebpf_provider.go","file.line":220},
"message":"%!w(*errors.errorString=&{process 59414 was not seen after 281.383636ms})","service.name":"auditbeat","ecs.version":"1.6.0"}

{"log.level":"warn","@timestamp":"2024-07-25T16:45:05.690-0400","log.logger":"processor.add_session_metadata","log.origin":{"function":"github.com/elastic/beats/v7/x-pack/auditbeat/processors/sessionmd/provider/procfs_provider.prvdr.SyncDB","file.name":"procfs_provider/procfs_provider.go","file.line":63},
"message":"couldn't get process info from proc for pid 119514: %!w(*fs.PathError=&{stat /proc/119514 2})","service.name":"auditbeat","ecs.version":"1.6.0"}

After the cleanup they look like this:

{"log.level":"warn","@timestamp":"2024-07-25T17:06:31.449-0400","log.logger":"processor.add_session_metadata","log.origin":{"function":"github.com/elastic/beats/v7/x-pack/auditbeat/processors/sessionmd/provider/ebpf_provider.prvdr.SyncDB","file.name":"ebpf_provider/ebpf_provider.go","file.line":220},
"message":"process 163540 was not seen after 281.147615ms","service.name":"auditbeat","ecs.version":"1.6.0"}

{"log.level":"warn","@timestamp":"2024-07-25T17:00:26.122-0400","log.logger":"processor.add_session_metadata","log.origin":{"function":"github.com/elastic/beats/v7/x-pack/auditbeat/processors/sessionmd/provider/procfs_provider.prvdr.SyncDB","file.name":"procfs_provider/procfs_provider.go","file.line":63},
"message":"couldn't get process info from proc for pid 151115: stat /proc/151115: no such file or directory","service.name":"auditbeat","ecs.version":"1.6.0"}

Checklist

• My code follows the style guidelines of this project

[elasticmachine]

Pinging @elastic/sec-deployment-and-devices (Team:Security-Deployment and Devices)