Reuse checksums in legacy signing codepath

[dagnir]

Motivation and Context

This commit adds support for reusing calculated payload checksums over retries in the legacy (i.e. non-SRA) signing codepaths.

Builds on #6441.

Modifications

Testing

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist

• I have read the CONTRIBUTING document
• Local run of mvn install succeeds
• My code follows the code style of this project
• My change requires a change to the Javadoc documentation
• I have updated the Javadoc documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed
• I have added a changelog entry. Adding a new entry must be accomplished by running the scripts/new-change script and following the instructions. Commit the new file created by the script in .changes/next-release with your changes.
• My change is to implement 1.11 parity feature and I have updated LaunchChangelog

License

• I confirm that this pull request can be released under the Apache 2 license

[Fred1155]

Do we plan to add integration test to test the retry behavior for reusing the checksum?

[dagnir]

Do we plan to add integration test to test the retry behavior for reusing the checksum?

Good catch! We have mock HTTP client tests from a previous PR, but this is on on SRA. I'll add additional tests for non-SRA.

[sonarqubecloud]

Quality Gate failed

Failed conditions
64.7% Coverage on New Code (required ≥ 80%)
3.1% Duplication on New Code (required ≤ 3%)

See analysis details on SonarQube Cloud

[github-actions]

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