[log] updates in TxOrphanage

Summary:

- Add elapsed time in "remove orphan" log
- Add size in "stored orphan" log
- grammar edit

Backport of core#30000.

Depends on D16503.

Test Plan:

ninja all check-all

Reviewers: #bitcoin_abc, PiRK

Reviewed By: #bitcoin_abc, PiRK

Differential Revision: https://reviews.bitcoinabc.org/D16504