Add daily budget field to Pinterest Ads#635

Please ad a field for daily budget to Pinterest Ads. I think they have it available in their api docs:
https://developers.pinterest.com/docs/api/v5/#operation/ad_groups/create

budget_type

string
Default: “DAILY”
Enum: “DAILY” “LIFETIME” “CBO_ADGROUP”
Budget type. If DAILY, an ad group’s daily spend will not exceed the budget parameter value. If LIFETIME, the end_time parameter is REQUIRED, and the ad group spend is spread evenly between the ad group start_time and end_time range. A CBO campaign automatically generates ad group budgets from its campaign budget to maximize campaign outcome. For CBO campaigns, only “CBO_ADGROUP” is allowed. For WEB_SESSIONS campaigns, only “LIFETIME” is allowed. For update, only draft ad groups may update budget type.

this was deployed