`EventsDataSource` is missing the `metrics` value

[smeijer]

Describe the bug
EventsDataSource is missing the metrics value:

datadog-api-client-typescript/packages/datadog-api-client-v2/models/ObjectSerializer.ts

Line 1995 in 507ae5d

EventsDataSource: ["logs", "rum"],

metrics is a valid value, as is seen here: https://docs.datadoghq.com/api/latest/metrics/?code-lang=typescript#query-scalar-data-across-multiple-products

Without that value, the client logs the error:

could not serialize EventsScalarQuery (TypeError: unknown enum value 'metrics')

To Reproduce
Run the TypeScript example as shown here: https://docs.datadoghq.com/api/latest/metrics/?code-lang=typescript#query-scalar-data-across-multiple-products

Expected behavior
No error should be logged when using the client as shown on the docs page linked above.

Environment and Versions (please complete the following information):
A clear and precise description of your setup:

• version for this project in use. 1.33.1