[rust] fix dev version rewrite when dd-trace-rs has no git repo (#6974)

Co-authored-by: bjorn.antonsson <bjorn.antonsson@datadoghq.com>

Author: bantonsson

utils/build/docker/rust/install_ddtrace.sh

@@ -36,7 +36,8 @@ if [ -e /binaries/dd-trace-rs ]; then
     fi
 
     echo "generating dev version $dev_version from $current_version"
-    cargo release version -p datadog-opentelemetry "$dev_version" -x --no-confirm
+    # cargo release requires a git repo; use sed to rewrite the workspace version directly
+    sed -i "s/^version = \"${current_version}\"/version = \"${dev_version}\"/" /binaries/dd-trace-rs/Cargo.toml
 
     cd /usr/app
     cargo add datadog-opentelemetry --path /binaries/dd-trace-rs/datadog-opentelemetry --features metrics-http,metrics-grpc,logs-http,logs-grpc

utils/build/docker/rust/parametric/Dockerfile

@@ -7,8 +7,6 @@ COPY utils/build/docker/rust/parametric/src /usr/app/
 
 RUN apt-get update && apt-get install -y --no-install-recommends openssh-client git jq build-essential perl libssl-dev
 
-RUN cargo install cargo-release@0.25.18 --locked
-
 RUN /binaries/install_ddtrace.sh
 
 RUN \