chore: update hermetic build docker volume usage

[diegomarquezp]

Follow up of googleapis/sdk-platform-java#2615
The way we use the docker image changed with that pull request. Here we adapt to those changes.

[diegomarquezp]

Confirmed locally that generation/hermetic_library_generation.sh worked:

Library postprocessing finished successfully
Regenerating root pom.xml
Regenerating gapic-libraries-bom
Configuration diff:
28c28
<     personnel. - test2
---
>     personnel. -test2
[update-library-generation-docker-volume-usage e01a95db362] chore: generate libraries at Wed May  1 05:54:59 PM UTC 2024
 2 files changed, 3 insertions(+), 3 deletions(-)
Enumerating objects: 9, done.
Counting objects: 100% (9/9), done.
Delta compression using up to 24 threads
Compressing objects: 100% (5/5), done.
Writing objects: 100% (5/5), 486 bytes | 486.00 KiB/s, done.
Total 5 (delta 4), reused 0 (delta 0), pack-reused 0 (from 0)
remote: Resolving deltas: 100% (4/4), completed with 4 local objects.
To https://github.com/googleapis/google-cloud-java
   1d3caed6359..e01a95db362  update-library-generation-docker-volume-usage -> update-library-generation-docker-volume-usage

[diegomarquezp]

From https://github.com/googleapis/google-cloud-java/actions/runs/8913106957/job/24477945575?pr=10770

docker: Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: exec: "--baseline-generation-config-path=/workspace/baseline_generation_config.yaml": stat --baseline-generation-config-path=/workspace/baseline_generation_config.yaml: no such file or directory: unknown.

This is because 2.39.0 has a different interface. We need to wait until 2.40 is released to perform this change

[JoeWang1127]

Could you change this command to use entry_point.py because the cli in generate_repo.py will be removed soon.

[blakeli0]

I guess this is the command enables us to modify/delete the docker generated files?

[diegomarquezp]

yes, including ownership takeover performed by the container

[JoeWang1127]

Included in #10758