[FEATURE] sls_logs.proto建议定义成ms时间戳Again

[bbz525]

Concisely describe the proposed feature
A clear and concise description of what you want. For example,

I would like to add an input plugin to collect logs by SNMP protocol so that my network devices' logs will be collected.

Describe the solution you'd like (if any)
A clear and concise description of what you want to achieve and implement. For example,

We can use the package github.com/gosnmp/gosnmp to act as an snmp server in a gesture to collect client logs.

Additional comments
Add any other context or screenshots about the feature request here.
For example, the ideal input and output logs.

The logs are supposed to have the following contents, e.g.,

{"_target_":"127.0.0.1","_field_":"DISMAN-EXPRESSION-MIB::sysUpTimeInstance","_oid_":".1.3.6.1.2.1.1.3.0","_type_":"TimeTicks","_content_":"10423593"}

[bbz525]

https://ilogtail.gitbook.io/ilogtail-docs/plugins/processor/native/processor-parse-timestamp-native
这个插件仍旧不能解决问题

[Abingcbc]

@bbz525 预期输出里似乎没有时间戳相关的字段，可以再描述详细点吗？