[Login] Improve error messaging when application password is disabled.

[hafizrahman]

Closes: #14004

Description

Steps to reproduce

1. Create test site with WooCommerce and no Jetpack,
2. Install and active this plugin https://wordpress.org/plugins/disable-application-passwords/
3. ...

Testing information

Screenshots

---

• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

Reviewer (or Author, in the case of optional code reviews):

Please make sure these conditions are met before approving the PR, or request changes if the PR needs improvement:

• The PR is small and has a clear, single focus, or a valid explanation is provided in the description. If needed, please request to split it into smaller PRs.
• Ensure Adequate Unit Test Coverage: The changes are reasonably covered by unit tests or an explanation is provided in the PR description.
• Manual Testing: The author listed all the tests they ran, including smoke tests when needed (e.g., for refactorings). The reviewer confirmed that the PR works as expected on all devices (phone/tablet) and no regressions are added.

[dangermattic]

	1 Message
📖	This PR is still a Draft: some checks will be skipped.

Generated by 🚫 Danger

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce iOS by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce iOS
	Build Number	pr14269-cf69dbb
	Version	20.9
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	cf69dbb
	App Center Build	WooCommerce - Prototype Builds #11382

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.