[Telemetry Audit] Move password generator probes to the autofill.passwords_generator.yaml file

[data-sync-user]

The Task

This task is to move password_generator probes out of the monolithic metrics.yaml file and into the autofill.password_generator.yaml file with an Autofill tag and Passwords tag.

You can look up these probes in the Glean dictionary as well: https://dictionary.telemetry.mozilla.org/apps/firefox_ios

Probes to Move

• password_generator.filled
• password_generator.shown

Note: The Autofill and PasswordGenerator tags will be automatically applied at the top of the autofill.password_generator.yaml file.

Example

You can see an example of this type of work in the following PR: https://github.com/mozilla-mobile/firefox-ios/pull/27083

:information_source: Reference Person

@ih-codes

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