Fix issue where bad scc creds were preventing scc refreshing

[mseidl]

What does this PR change?

Port already merged in 4.3

Fixes issue when with one bad credential would prevent the other good credential from refreshing.
#21473
https://bugzilla.suse.com/show_bug.cgi?id=1211355

GUI diff

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Before:

After:

• DONE

Documentation

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• No documentation needed: only internal and user invisible changes

• Documentation issue was created: Link for SUSE Manager contributors, Link for community contributors.

• API documentation added: please review the Wiki page Writing Documentation for the API if you have any changes to API documentation.

• (OPTIONAL) Documentation PR

• DONE

Test coverage

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• No tests: already covered

• Unit tests were added

• Cucumber tests were added

• DONE

Links

Fixes #
Tracks # add downstream PR, if any

• DONE

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[github-actions]

Suggested tests to cover this Pull Request

• srv_handle_software_channels_with_ISS_v2
• allcli_sanity
• srv_manage_channels_page
• srv_channels_add
• srv_sync_products
• srv_delete_channel_with_tool
• srv_menu
• srv_sync_channels
• srv_content_lifecycle
• srv_task_status_engine
• srv_first_settings
• srv_menu_filter
• srv_wait_for_reposync
• allcli_update_activationkeys
• srv_enable_sync_products
• srv_create_repository
• srv_delete_channel_from_ui
• srv_disable_local_repos_off
• srv_add_rocky8_repositories
• srv_channel_api
• srv_clone_channel_npn