feat(aci): Add ability to create envs inline

[saponifi3d]

Description

Updated the environment selector to be able to create a new environment inline.

Right now, we can only select environments on Uptime and Metric monitors. The Metric monitor will be able to save the new environments after #112537 is deployed.

Metric Monitor

Uptime Monitor

Uptime Saves

[sentry]

Bug: The internal onCreateOption handler is placed before {...props}, so a caller-provided onCreateOption will override it, preventing new options from being saved.
_{Severity: MEDIUM}

Suggested Fix

Move the component's props, including the internal onCreateOption handler, to be defined after the {...props} spread. This ensures the internal logic is preserved and can be extended by chaining any caller-provided onCreateOption function if needed.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent.
Verify if this is a real issue. If it is, propose a fix; if not, explain why it's not
valid.

Location:
static/app/views/detectors/components/forms/common/environmentField.tsx#L51-L55

Potential issue: In the `EnvironmentField` component, the internal `onCreateOption`
handler is defined before the `{...props}` spread. This means any `onCreateOption` prop
passed by a parent component will silently override the internal logic. The internal
handler is responsible for adding newly created environment options to the dropdown
choices and updating the form's state. When this handler is overridden, these actions do
not occur, and the newly created option is effectively lost, not being reflected in the
UI or the form data.

_{Did we get this right? 👍 / 👎 to inform future reviews.}