Bump hashicorp/setup-terraform from 2 to 3 #593

Job	Run time
get-test-cases	4s
changes	7s
create-test-ref	2s
validate-markdown	11s
build-windows	44m 43s
build	34m 9s
packaging-deb	33s
packaging-rpm	59s
packaging-msi	2m 2s
run-test-case (statsd_mock)	21s
run-test-case (otlp_metric_mock)	25s
run-test-case (otlp_mock)	25s
run-test-case (otlp_grpc_exporter_metric_mock)	26s
run-test-case (otlp_grpc_exporter_trace_mock)	25s
run-test-case (otlp_http_exporter_metric_mock)	18s
run-test-case (otlp_http_exporter_trace_mock)	22s
run-test-case (sapm_exporter_trace_mock)	16s
run-test-case (signalfx_exporter_metric_mock)	28s
run-test-case (dynatrace_exporter_metric_mock)	24s
run-test-case (datadog_exporter_metric_mock)	18s
run-test-case (datadog_exporter_trace_mock)	25s
run-test-case (prometheus_mock)	24s
run-test-case (zipkin_mock)	25s
run-test-case (jaeger_mock)	24s
run-test-case (logzio_exporter_trace_mock)	16s
test-control-stript	14s
	1h 29m 6s

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