fix(automations): fix validation error when selecting Tagged Event

[afsuyadi]

This PR fixes #115268 ; the bug that appears when creating Alert.

Testing scenario:

1. Click create Alert button
2. On the If section, chooses Tagged Event
3. The key will be automatically filled with 'Tag' string
4. Fill in manually the Match and Value field
5. When clicking Create Alert, the validation keeps appearing as a blocker.

Screencast.from.23-05-26.23.13.55.webm

Analyze:

1. In function validateTaggedEventCondition, the key seems to always be falsy.
2. The hook onChange in KeyField's component seems to not fire anything, which causes the Key to not be saved.

Solution:

1. Use hook onBlur to manually commit whatever was typed - which will required useRef & onInputChange hook.

After implement:
Screencast from 24-05-26 23:33:07.webm

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[dule1013]

Seems good