Retry apt-get and rustup on CI

`Setup rust toolchain` build step was observed to be flaky. Retries may
help.

.github/actions/setup-builder/action.yaml

@@ -28,16 +28,18 @@ runs:
     - name: Install Build Dependencies
       shell: bash
       run: |
-        apt-get update
-        apt-get install -y protobuf-compiler
+        RETRY=ci/bin/retry
+        "${RETRY}" apt-get update
+        "${RETRY}" apt-get install -y protobuf-compiler
     - name: Setup Rust toolchain
       shell: bash
       # rustfmt is needed for the substrait build script
       run: |
+        RETRY=ci/bin/retry
         echo "Installing ${{ inputs.rust-version }}"
-        rustup toolchain install ${{ inputs.rust-version }}
-        rustup default ${{ inputs.rust-version }}
-        rustup component add rustfmt
+        "${RETRY}" rustup toolchain install ${{ inputs.rust-version }}
+        "${RETRY}" rustup default ${{ inputs.rust-version }}
+        "${RETRY}" rustup component add rustfmt
     - name: Configure rust runtime env
       uses: ./.github/actions/setup-rust-runtime
     - name: Fixup git permissions

ci/scripts/retry

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+x() {
+    echo "+ $*" >&2
+    "$@"
+}
+
+max_retry_time_seconds=$(( 30 * 60 ))
+retry_delay_seconds=10
+
+END=$(( $(date +%s) + ${max_retry_time_seconds} ))
+
+while (( $(date +%s) < $END )); do
+    x "$@" && exit 0
+    sleep "${retry_delay_seconds}"
+done
+
+echo "$0: retrying [$*] timed out" >&2
+exit 1