Upgrade CI to use docker-compose v2 (#3543)

## Motivation and Context
- https://github.com/actions/runner-images/issues/9557
- https://docs.docker.com/compose/migrate/

## Description
It seems like they should be drop-in compatible for our use case.

----

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copy, and redistribute this contribution, under the terms of your
choice._

ci

@@ -10,7 +10,7 @@ if [[ $# -lt 1 ]]; then
     echo "Usage: ci <action> [args...]"
     echo
     echo "Runs a CI action from tools/ci-build/scripts within the Docker build image."
-    echo "Requires Docker and docker-compose to both be installed."
+    echo "Requires Docker and docker compose to both be installed."
     echo
     echo "Note: Some actions may require 'aws-sdk-rust' and/or 'aws-doc-sdk-examples'"
     echo "to be checked out in the same directory as 'smithy-rs'."

tools/ci-build/ci-action

@@ -33,7 +33,7 @@ ACTION_PATH="$("${SCRIPT_PATH}"/ci-create-workspace)"
 cd "${SCRIPT_PATH}"
 
 function cleanup {
-    docker-compose -f build.docker-compose.yml down
+    docker compose -f build.docker-compose.yml down
     cd "${START_PATH}"
     mv "${ACTION_PATH}/workspace/artifacts" .
     if [[ -d "${ACTION_PATH}/workspace/smithy-rs/target" ]]; then
@@ -51,10 +51,10 @@ GROUP_ID="$(id -g)"
 export USER_ID
 export GROUP_ID
 export GRADLE_CACHE_PATH="${START_PATH}/gradle"
-docker-compose -f build.docker-compose.yml up -d
+docker compose -f build.docker-compose.yml up -d
 if [[ "${ACTION_NAME}" == "--shell" ]]; then
-    docker-compose -f build.docker-compose.yml exec smithy-rs-build /bin/bash
+    docker compose -f build.docker-compose.yml exec smithy-rs-build /bin/bash
 else
-    docker-compose -f build.docker-compose.yml exec -T smithy-rs-build bash -c "cd workspace; ./ci-scripts/${ACTION_NAME} ${ACTION_ARGS[*]}"
+    docker compose -f build.docker-compose.yml exec -T smithy-rs-build bash -c "cd workspace; ./ci-scripts/${ACTION_NAME} ${ACTION_ARGS[*]}"
 fi
 exit $?