Bring old Signer back

[gosar]

Motivation and Context

To support service level release control, we need to be able to codegen with both pre SRA and post SRA code. So need to bring codegen code back related to old Signers.

Modifications

Bringing back code by reverting these PRs:
#4286
#4292
#4280
Fixed tests the break with the reverts.

This is not the end state. With this PR, both old Signer and new SRA related logic (AuthSchemes and HttpSigner) are getting generated and configured on the client. Next PR needs to introduce a flag and switch the codegen logic to generate only one or the other. If the CI doesn't break at this PR, I'd prefer to keep the switching logic in separate PR, to make reviewing easier.

In this current state, because of

aws-sdk-java-v2/core/aws-core/src/main/java/software/amazon/awssdk/awscore/internal/AwsExecutionContextBuilder.java

Line 129 in 5635201

if (loadOldSigner(executionAttributes, originalRequest)) {

logic, in reality SRA codepath will get used in the clients in most cases, except when isSignerOverridden==true, which will be the case if Signer is set on the client by customer, or if we internally set it for some operations that use a different Signer than the default Signer on the client (e.g., event streaming, etc.). So unless there are codegen-generated-classes-test or other that assert whether Signer/HttpSigner is actually used end-to-end, this may be a functionally working (nothing is broken) state. Or the CI will prove this point wrong ;)

Testing

Fixed some unit tests to make it work with configuring both pre/post SRA approach. Relying on CI to know if anything else breaks at this point.
update: Well, 1 test failed in the CI - async_putObject_httpChecksumValidation_withIncorrectChecksum. I don't fully understand why, but the same test for the sync client was already disabled earlier. We need to make sure flexible checksum work anyways and re-enable both these tests. I feel let's take that on separately for both sync and async and let this part of bringing old Signer back go through, so I can make the other changes to add the flag to switch between pre/post SRA logic in subsequent PR that builds on this PR.

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

[sonarqubecloud]

SonarCloud Quality Gate failed.   

4 Bugs
0 Vulnerabilities
2 Security Hotspots
445 Code Smells

84.6% Coverage
3.7% Duplication

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