Add logging for dns lookups with timestamps

[Tanzp01]

Added 2 structured loggings for:

1. dns lookup latency with timestamp
2. dns error with timestamp

What type of PR is this?

/kind feature

What this PR does / why we need it:

To better analyse the performance of DNS over time

Special notes for your reviewer:

There were existing loggings, but not structured. I added these 2 opt-in structured logging while keeping the previous loggings, so that any existing analysis based on the logging won't be affected

[k8s-ci-robot]

Hi @Tanzp01. Thanks for your PR.

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[Tanzp01]

cc @bowei the owner of this directory

[bowei]

/assign @bowei

[bowei]

/ok-to-test

[jprzychodzen]

/lgtm

/assign @tosi3k

[bowei]

Unrelated comment:

• There is what looks like abandoned code in comments at the bottom -- I would send another PR to delete it.
• The timedOut variable looks weird to me but don't fix it in this change.

[bowei]

seems like there are a few more minor comments that are open.

[bowei]

/approve
/lgtm

Seems like there are some minor comments that are still open

[bowei]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bowei, jprzychodzen, marqc, Tanzp01

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• dns/OWNERS [bowei]

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