fix: linux builds: use gcc 10 in Linux builds (#4841)

Cross.toml

@@ -1,4 +1,7 @@
 # Configuration for cross-compiling using cross
+[build.env]
+passthrough = [ "CC" ]
+
 [target.aarch64-unknown-linux-gnu]
 xargo = false
 pre-build = [
@@ -11,15 +14,8 @@ pre-build = [
      pkg-config \
      libssl-dev:arm64 \
      libdbus-1-dev:arm64 \
-     libxcb1-dev:arm64
-    """,
-    """\
-    curl -LO https://github.com/protocolbuffers/protobuf/releases/download/v31.1/protoc-31.1-linux-x86_64.zip && \
-    unzip -o protoc-31.1-linux-x86_64.zip -d /usr/local && \
-    chmod +x /usr/local/bin/protoc && \
-    ln -sf /usr/local/bin/protoc /usr/bin/protoc && \
-    which protoc && \
-    protoc --version
+     libxcb1-dev:arm64 \
+     gcc-10
     """
 ]
 
@@ -33,15 +29,8 @@ pre-build = [
      pkg-config \
      libssl-dev \
      libdbus-1-dev \
-     libxcb1-dev
-    """,
-    """\
-    curl -LO https://github.com/protocolbuffers/protobuf/releases/download/v31.1/protoc-31.1-linux-x86_64.zip && \
-    unzip -o protoc-31.1-linux-x86_64.zip -d /usr/local && \
-    chmod +x /usr/local/bin/protoc && \
-    ln -sf /usr/local/bin/protoc /usr/bin/protoc && \
-    which protoc && \
-    protoc --version
+     libxcb1-dev \
+     gcc-10
     """
 ]
 
@@ -53,12 +42,5 @@ pre-build = [
     apt-get update && apt-get install -y \
      curl \
      unzip
-    """,
-    """\
-    curl -LO https://github.com/protocolbuffers/protobuf/releases/download/v31.1/protoc-31.1-linux-x86_64.zip && \
-    unzip protoc-31.1-linux-x86_64.zip -d /usr/local && \
-    chmod +x /usr/local/bin/protoc && \
-    export PROTOC=/usr/local/bin/protoc && \
-    protoc --version
     """
 ]