feat: add cron_tz to model_defaults #3667

Job	Run time
changes	10s
test-dbt-versions (1.8)	1m 44s
test-dbt-versions (1.6)	1m 53s
test-dbt-versions (1.3)	1m 44s
test-dbt-versions (1.7)	1m 47s
test-dbt-versions (1.10)	1m 38s
test-dbt-versions (1.5)	1m 34s
test-dbt-versions (1.9)	1m 48s
test-dbt-versions (1.4)	1m 28s
test-vscode-e2e	0s
test-vscode	0s
doc-tests	36s
migration-test	1m 29s
cicd-tests-windows	9m 41s
style-and-cicd-tests (3.13)	22m 59s
style-and-cicd-tests (3.10)	24m 0s
style-and-cicd-tests (3.11)	20m 27s
style-and-cicd-tests (3.12)	22m 58s
style-and-cicd-tests (3.9)	26m 1s
engine-tests-docker (mssql)	1m 49s
engine-tests-docker (mysql)	2m 22s
engine-tests-docker (clickhouse)	2m 42s
engine-tests-docker (spark)	5m 19s
engine-tests-docker (postgres)	2m 37s
engine-tests-docker (trino)	8m 7s
engine-tests-docker (risingwave)	2m 31s
engine-tests-docker (duckdb)	1m 20s
ui-style	0s
ui-test	0s
engine-tests-cloud	0s
	2h 48m 44s

Provide feedback