[Feature] --event-start-time and --event-end-time as CLI flags for specifying microbatch start and end times

[QMalcolm]

Housekeeping

• I am a maintainer of dbt-core

Short description

In #10624 we're building a new type of incremental model strategy, microbatch. The microbatch strategy is cool for a lot of reasons, that can be read about elsewhere. To support that we need a concept an event_start_time and event_end_time. Specifically, people should be able to specify these values via the CLI
A CLI invocation using the flags would look like

$ dbt run --event-time-start "2024-09-01 00:00:00" --event-time-end "2024-09-04 00:00:00"

Acceptance criteria

• --event-time-start can be passed as a CLI argument
• --event-time-end can be passed as a CLI argument

Suggested Tests

1. --event-time-start can be specified in the CLI without error
2. --event-time-end can be specified in the CLI without error

Impact to Other Teams

N/A

Will backports be required?

No

Context

No response

[QMalcolm]

Resolved by #10594