Use a rustv1 directory from aws-doc-sdk-examples (#3287)

## Motivation and Context
This PR is a cleanup after
#3115, fully switching to
`rustv1` for the rust example directory in
[aws-doc-sdk-examples](https://github.com/awsdocs/aws-doc-sdk-examples).

----

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

Author: ysaito1001

.github/workflows/ci.yml

@@ -65,7 +65,6 @@ jobs:
       with:
         repository: awsdocs/aws-doc-sdk-examples
         path: aws-doc-sdk-examples
-        ref: rust-launch
     - name: Run ${{ matrix.actions.action }}
       uses: ./smithy-rs/.github/actions/docker-build
       with:

tools/ci-build/sdk-versioner/README.md

@@ -12,12 +12,12 @@ Example updating SDK examples to use SDK version 0.5.0 with Smithy version 0.35.
 $ sdk-versioner \
   --sdk-version 0.5.0 \
   --smithy-version 0.35.0 \
-  path/to/aws-doc-sdk-examples/rust
+  path/to/aws-doc-sdk-examples/rustv1
 ```
 
 Example updating SDK examples to refer to local generated code:
 ```bash
 $ sdk-versioner \
   --sdk-path path/to/smithy-rs/aws/sdk/build/aws-sdk/sdk \
-  path/to/aws-doc-sdk-examples/rust
+  path/to/aws-doc-sdk-examples/rustv1
 ```

tools/ci-scripts/generate-aws-sdk

@@ -23,12 +23,7 @@ fi
 
 echo -e "${C_YELLOW}Taking examples from 'awsdocs/aws-doc-sdk-examples'...${C_RESET}"
 examples_revision=$(cd aws-doc-sdk-examples; git rev-parse HEAD)
-# TODO(removeSdkExamplesDevPreview): One release after `rust_dev_preview` is renamed to `rust`, this check can be cleaned up
-if [[ -d "aws-doc-sdk-examples/rust" ]]; then
-  mv aws-doc-sdk-examples/rust smithy-rs/aws/sdk/examples
-else
-  mv aws-doc-sdk-examples/rust_dev_preview smithy-rs/aws/sdk/examples
-fi
+mv aws-doc-sdk-examples/rustv1 smithy-rs/aws/sdk/examples
 rm -rf smithy-rs/aws/sdk/examples/.cargo
 
 echo -e "${C_YELLOW}Creating empty model metadata file since we don't have model update information...${C_RESET}"