fix: interval macro unit #3702

Job	Run time
changes	8s
test-dbt-versions (1.3)	1m 38s
test-dbt-versions (1.7)	1m 38s
test-dbt-versions (1.8)	1m 36s
test-dbt-versions (1.10)	1m 38s
test-dbt-versions (1.6)	1m 34s
test-dbt-versions (1.4)	1m 30s
test-dbt-versions (1.9)	1m 46s
test-dbt-versions (1.5)	1m 30s
test-vscode	0s
test-vscode-e2e	0s
doc-tests	37s
cicd-tests-windows	12m 9s
style-and-cicd-tests (3.13)	20m 37s
style-and-cicd-tests (3.11)	24m 32s
style-and-cicd-tests (3.12)	25m 33s
style-and-cicd-tests (3.10)	21m 57s
engine-tests-docker (postgres)	2m 26s
engine-tests-docker (trino)	8m 20s
engine-tests-docker (mssql)	1m 49s
engine-tests-docker (risingwave)	2m 44s
engine-tests-docker (clickhouse)	2m 43s
engine-tests-docker (spark)	6m 22s
migration-test	1m 42s
engine-tests-docker (duckdb)	1m 38s
style-and-cicd-tests (3.9)	22m 24s
engine-tests-docker (mysql)	1m 44s
ui-style	0s
ui-test	0s
engine-tests-cloud	0s
	2h 50m 15s

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