CI: Port Upgrade test to Rust

[tjtelan]

Related to #3003

The upgrade test is brittle. We assume upgrades succeed only if versions are different.

It relied on the comparing version updates using string length of versions (of a specific length) instead of comparing based on semver x.y.z.

When we started using prerelease (e.g. alpha, beta, dev), exposed this flaw of assuming the length of the version string.

fluvio/tests/upgrade-test.sh

Line 30 in 6943374

readonly PRERELEASE=${2:-$(cat VERSION)-$(git rev-parse HEAD)}

fluvio/tests/upgrade-test.sh

Lines 133 to 155 in 6943374

	if [[ ! -z "$USE_LATEST" ]];
	then
	# Use the "latest" fluvio channel
	echo "Switch to \"latest\" channel CLI"
	FLUVIO_BIN_ABS_PATH=${HOME}/.fluvio/bin/fluvio
	$FLUVIO_BIN_ABS_PATH version switch latest
	DEV_VERSION=$($FLUVIO_BIN_ABS_PATH update | grep "Downloading Fluvio" | grep -v "channel" | awk '{print $8}' | sed 's/[+]/-/')
	# This is slicing the DEV_VERSION string that is expected to look like this (including the ...):
	# ex. 0.9.17-f7e196f3c3c5cefd0339afb85543073a12db9c5d...
	TARGET_VERSION=${DEV_VERSION::-44}
	echo "Installed CLI version ${DEV_VERSION}"
	echo "Upgrading cluster to ${DEV_VERSION}"
	$FLUVIO_BIN_ABS_PATH cluster upgrade
	echo "Wait for SPU to be upgraded. sleeping 1 minute"
	else
	echo "Test local image v${PRERELEASE}"
	TARGET_VERSION=${PRERELEASE::-41}
	# This should use the binary that the Makefile set
	echo "Using Fluvio binary located @ ${FLUVIO_BIN_ABS_PATH}"
	$FLUVIO_BIN_ABS_PATH cluster upgrade --develop
	fi

I suspect job failure is due to evaluating this line

fluvio/tests/upgrade-test.sh

Line 128 in 6943374

local FLUVIO_BIN_ABS_PATH=$(${READLINK} -f $FLUVIO_BIN)

Output

 readlink: missing operand
Try 'readlink --help' for more information.
-: OK

Logs from failed job in CD_Dev: https://github.com/infinyon/fluvio/actions/runs/4546452513/jobs/8015101349
logs_37217.zip