SSO new system option: redirect to the referer url

[garmashdev]

Description

This PR adds a new Yes/No option to the Magento Bolt settings: SSO Redirect to Previous Page.

When enabled, after a successful SSO login, the customer will be redirected back to the page they came from, instead of being redirected to the customer account page.

Fixes: https://app.devrev.ai/bolt-inc/works/ISS-3365

#changelog SSO new system option: redirect to the referer url

Type of change

• Bug fix (change which fixes an issue)
• New feature (change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please validate that you have tested your change in at least one of the following areas:

• Successfully tested locally (or docker image)
• Successfully tested on a staging or sandbox server
• Successfully tested on a merchant's staging server

For PR Reviewer

• Reviewed unit tests to make sure we are using real components rather than mocks as much as possible?
• For any major change (observer, new Bolt feature, core Magento interaction) we must add a feature switch, did you verify this?

Checklist:

• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• New and existing unit tests pass locally with my changes.
• I have created or modified unit tests to sufficiently cover my changes.
• I have added my ticket link and provided a changelog message.

[peril-bolt]

	Warnings
⚠️	Please make sure to add new test or update existing tests
⚠️	Helper/Config.php has been changed - please make sure you have updated getAllConfigSettings.

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