fix: do not expire self multiaddrs

[achingbrain]

Do not apply address/record expiry to the peer store entry for the self peer.

Fixes #3051

Change checklist

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation if necessary (this includes comments as well)
• I have added tests that prove my fix is effective or that my feature works

[SgtPooki]

to be clear, we don't expire self addresses, but updates do to network changes will update the addresses in the store, which will remove old invalid addresses, correct?

[achingbrain]

Yes, the address manager updates the peer store record when listening addresses change.