allow for configuring pr preview default start and min intervals separately #3779

Job	Run time
test-dbt-versions (1.8)	1m 40s
test-dbt-versions (1.5)	1m 40s
test-dbt-versions (1.10)	1m 44s
test-dbt-versions (1.3)	1m 36s
test-dbt-versions (1.4)	1m 37s
test-dbt-versions (1.9)	1m 52s
test-dbt-versions (1.7)	2m 44s
test-dbt-versions (1.6)	2m 39s
changes	13s
test-vscode	-1s
test-vscode-e2e	-9s
doc-tests	35s
cicd-tests-windows	12m 41s
style-and-cicd-tests (3.10)	1h 21m 36s
style-and-cicd-tests (3.9)	25m 37s
style-and-cicd-tests (3.13)	25m 53s
style-and-cicd-tests (3.12)	28m 25s
style-and-cicd-tests (3.11)	25m 58s
migration-test	1m 31s
engine-tests-docker (duckdb)	5m 35s
engine-tests-docker (starrocks)	15m 14s
engine-tests-docker (spark)	9m 57s
engine-tests-docker (trino)	16m 27s
engine-tests-docker (mysql)	6m 34s
engine-tests-docker (mssql)	1m 46s
engine-tests-docker (risingwave)	12m 47s
engine-tests-docker (clickhouse)	3m 38s
engine-tests-docker (postgres)	2m 57s
ui-style	-1s
ui-test	-1s
engine-tests-cloud	0s
	4h 52m 44s

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