fix: add grpc-plugins package to protoc base image

In Alpine 3.21, grpc_cpp_plugin is in a separate grpc-plugins package.

Author: scmichaelg

protoc/Dockerfile

@@ -1,7 +1,7 @@
 FROM alpine:3.21
 LABEL maintainer="SafetyCulture <info@safetyculture.io>"
 
-RUN apk add --no-cache --repository=https://dl-cdn.alpinelinux.org/alpine/v3.21/community protoc grpc
+RUN apk add --no-cache --repository=https://dl-cdn.alpinelinux.org/alpine/v3.21/community protoc grpc grpc-plugins
 RUN mkdir /defs
 
 COPY --from=bufbuild/buf:1.66.0 /usr/local/bin/buf /usr/local/bin/buf