otelconf: add support for `log_level`

[codeboten]

Component

Config

Problem Statement

As per suggestion in #8026 (comment)

Proposed Solution

Use the LogLevel field and call SetLogger with the appropriate level

Alternatives

No response

Prior Art

No response

Additional Context

No response

[CtrlSpice]

Hi! Could I get assigned to this please?

[flc1125]

@CtrlSpice It's yours.

[codeboten]

Thanks @CtrlSpice!