[pkg/ottl] Update contexts so that all time fields Getters return time.Time and Setters take time.Time

[TylerHelmuth]

OTTL contexts are updated so that all time fields Getters return time.Time and Setters take time.Time. The accessor names should be updated to drop the time precision (_nano).

Context and fields that need updating:

• ottldatapoint
  • start_time_unix_nano
  • time_unix_nano
• ottllog
  • time_unix_nano
  • observed_time_unix_nano
• ottlspan
  • start_time_unix_nano
  • end_time_unix_nano
• ottlspanevent
  • time_unix_nano

Will also need to update all the cache accessors to be able to handle getting and setting time.Time and time.Duration. Instead of getting and setting a pcommon.Map it should be expressed as a map[string]string.

[ptimofee]

Just hit this with newly introduced in 0.81.0 Time() converter when wanted to convert some fields from k8s events to Timestamp to send event logs to ElasticSearch

      transform:
        error_mode: ignore
        log_statements:
        - context: log
          statements:
          - set(time_unix_nano, Time(body["object"]["eventTime"], "%Y-%m-%dT%H:%M:%SZ")) where body["object"]["eventTime"] != nil
          - set(time_unix_nano, Time(body["object"]["deprecatedLastTimestamp"], "%Y-%m-%dT%H:%M:%SZ")) where body["object"]["deprecatedLastTimestamp"] != nil

Looking forward to it!

[TylerHelmuth]

@ptimofee FYI the Unix nano paths haven't been updated to accept Times yet, they still expect integers. See the main tracking issue for progress on tying all this together.

[TylerHelmuth]

Nevermind, I see we are on the issue asking for this capability. Yes, we're working towards it.

[github-actions]

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