Upgrade pg_search to 0.15.0 #3024

Job	Run time
Find changed Cargo projects	5s
Run linters (./tembo-pod-init, tembo-pod-init)	3m 59s
Run tests (./tembo-pod-init, tembo-pod-init)	2m 38s
Run linters (./tembo-operator, tembo-operator)	2m 39s
Run tests (./tembo-operator, tembo-operator)	2m 16s
Run linters (./tembo-cli, tembo-cli)	1m 23s
Run tests (./tembo-cli, tembo-cli)	25m 31s
Run linters (./dataplane-webserver, dataplane-webserver)	1m 33s
Run tests (./dataplane-webserver, dataplane-webserver)	1m 4s
Run linters (./conductor, conductor)	1m 37s
Run tests (./conductor, conductor)	2m 2s
Run linters (./tembo-stacks, tembo-stacks)	45s
Run tests (./tembo-stacks, tembo-stacks)	48s
	46m 20s

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