Fix the check manifests tool

[jdisanti]

Motivation and Context

CI on PRs in aws-sdk-rust are failing due to:

      Running `/home/runner/work/aws-sdk-rust/aws-sdk-rust/smithy-rs/tools/target/debug/publisher fix-manifests --check --location ../../../sdk`
2022-07-26T00:37:57.281962Z  INFO publisher::subcommand::fix_manifests::validate: Pre-validation manifests...
Error: Crate named `aws-sdk-accessanalyzer` should be at version `0.46.0` but is at `0.16.0`
Error: Process completed with exit code 1.

This PR updates the publisher tool's validation to no longer assume that all SDK crates have the same version number.

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

[github-actions]

A new generated diff is ready to view.

• AWS SDK (ignoring whitespace)
• No codegen difference in the Server Test
• No codegen difference in the Server Test Python

A new doc preview is ready to view.

[github-actions]

A new generated diff is ready to view.

• AWS SDK (ignoring whitespace)
• No codegen difference in the Server Test
• No codegen difference in the Server Test Python

A new doc preview is ready to view.