fix: reduce allocations in or_insert and get_or_insert

[hanabi1224]

Description

This PR tries to reduce allocations in a few places by replacing (get)_or_insert with (get)_or_insert_with

Notes & open questions

Change checklist

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• A changelog entry has been made in the appropriate crates

[elenaf9]

Thanks!

Approvals have been dismissed because the PR was updated after the send-it label was applied.

[drHuangMHT]

@elenaf9 need a merge from master that resolves the conflict and then re-approve

[hanabi1224]

@elenaf9 need a merge from master that resolves the conflict and then re-approve

@drHuangMHT merge conflict resolved

[drHuangMHT]

libp2p-webrtc check is reporting a semver issue. @elenaf9 maybe we should also refresh the tag(re-tag the send-it) so that the bot will notice.

[elenaf9]

libp2p-webrtc check is reporting a semver issue. @elenaf9 maybe we should also refresh the tag(re-tag the send-it) so that the bot will notice.

See #6136 (comment). Check is required but failing due to a bug in the CI script. I've discuss it with @jxs out-of-band, he'll do a manual merge.

Approvals have been dismissed because the PR was updated after the send-it label was applied.