feat: Include Spark connect in stacklet list #378

Job	Run time
General Pull Request Checks / Run Cargo Deny (advisories)	47s
General Pull Request Checks / Run Cargo Udeps	25m 35s
General Pull Request Checks / Run Cargo Deny (bans licenses sources)	46s
General Pull Request Checks / Run Cargo Tests	16m 20s
General Pull Request Checks / Run RustDoc	17m 1s
General Pull Request Checks / All tests passed	3s
Build stackablectl for x86_64-unknown-linux-gnu	13m 17s
Build stackablectl for x86_64-apple-darwin	10m 37s
Build stackablectl for aarch64-apple-darwin	8m 51s
Build stackablectl for aarch64-unknown-linux-gnu	13m 58s
	1h 47m 15s

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