We have a number of copies of `UnsafeTransfer` and two copies of
`UnsafeMutableTransferBox` in our code base. Before introducing more of
those, lets centralize to just one using a `package` access modifier.
### Motivation:
We have a way to update Benchmarks thresholds from CI logs but not for
the older Integration Tests.
### Modifications:
A new script which pulls integration test logs and uses our existing
parsing script to pull out updated values.
### Result:
Easier threshold updates.
```
❯ ./dev/update-integration-test-thresholds.sh
Usage: ./dev/update-integration-test-thresholds.sh <url>
or: URL=<url> ./dev/update-integration-test-thresholds.sh
Example:
./dev/update-integration-test-thresholds.sh https://github.com/apple/swift-nio/pull/3442
./dev/update-integration-test-thresholds.sh https://github.com/apple/swift-nio/actions/runs/19234929677
URL=https://github.com/apple/swift-nio/pull/3442 ./dev/update-integration-test-thresholds.sh
```
```
❯ ./dev/update-integration-test-thresholds.sh 'https://github.com/apple/swift-nio/actions/runs/19234929677/job/54982236271?pr=3442'
** Processing run in apple/swift-nio
** Fetching integration test checks from workflow run 19234929677
** Pulling logs for Swift nightly-main (job 54982236243)
** Updated IntegrationTests/tests_04_performance/Thresholds/nightly-main.json
** Pulling logs for Swift 6.2 (job 54982236259)
** Updated IntegrationTests/tests_04_performance/Thresholds/6.2.json
** Pulling logs for Swift nightly-next (job 54982236267)
** Updated IntegrationTests/tests_04_performance/Thresholds/nightly-next.json
** Pulling logs for Swift 6.0 (job 54982236271)
** Updated IntegrationTests/tests_04_performance/Thresholds/6.0.json
** Pulling logs for Swift 6.1 (job 54982236345)
** Updated IntegrationTests/tests_04_performance/Thresholds/6.1.json
** Done! Updated 5 threshold file(s)
```
Co-authored-by: Cory Benfield <lukasa@apple.com>
Fabian Fett
Rick Newton-RogersandCory Benfield