Restore `--location` to `publisher` (#2716)

## Motivation and Context
This PR adds back `--location` to the subcommand
`generate-version-manifest` for the `publisher`. Without this, CI would
fail due to the PR bot trying to use the already deleted command option
([link](https://github.com/awslabs/smithy-rs/actions/runs/5023168618/jobs/9007489752?pr=2712)).
It's important to note that all changes to `tools` need to be backwards
compatible across releases.

## Testing
Against the old and the new versions of
[`build.gradle.kts`](https://github.com/awslabs/smithy-rs/pull/2663/files

),
manually ran
```
./gradlew :aws:sdk:assemble
```
and confirmed that `versions.toml` got created under
`smithy-rs/aws/sdk/build/aws-sdk`.

----

_By submitting this pull request, I confirm that you can use, modify,
copy, and redistribute this contribution, under the terms of your
choice._

Co-authored-by: Yuki Saito <awsaito@amazon.com>