[pkg/ottl] New Unix converter to convert epoch timestamp to time.Time

[TylerHelmuth]

Component(s)

pkg/ottl

Describe the issue you're reporting

[### Component(s)

pkg/ottl

Is your feature request related to a problem? Please describe.

OTTL has no way to create a time.Time from an epoch time.

Describe the solution you'd like

A new Unix converter function. similar to Golang's Unix function, that converts the integer input to a time.Time.

The function should have 2 parameters. The first parameter should be the seconds input and is a IntGetter. The second input should be an optional IntGetter and represents the nanoseconds.

The implementing PR should

• Implement the function
• Add new unit tests for the function
• Add the function to pkg/ottl/ottlfuncs/functions.go
• Update the README at pkg/ottl/ottlfuncs/README.md

[kentquirk]

I'll take this one.

[codeboten]

All yours, thanks @kentquirk!

[iblancasa]

I think this issue can be closed since it was solved as part of #29088

[TylerHelmuth]

@iblancasa this issue has not yet been resolved. #29088 was closed since it is a duplicate of this issue.

[iblancasa]

Oh. Sorry. I can work on it

[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• pkg/ottl: @TylerHelmuth @kentquirk @bogdandrutu @evan-bradley

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[iblancasa]

I'll apply the changes requested in the PR today

[TylerHelmuth]

Closed via #31556