Make SDK runtime patch tool that supports SDK runtime crates (#3369)

A tool to patch in new versions of smithy-rs runtime crates was
introduced in #3327 so that semver breaks could better be detected for
upcoming releases. However, this tool didn't support patching in SDK
runtime crates, which is necessary for testing #3355.

This PR moves the tool into the runtime-versioner tool, and adjusts it
to support both smithy-rs and SDK runtime crates.

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