Exclude suspended providers from selected-providers-list-as-string

[yuseok89]

related: #61926

When provider files change, selective checks builds selected-providers-list-as-string and provider test types from affected providers and their dependencies.
Suspended providers (e.g. apache.beam) were included in these lists.

In #62791, provider test CI failed because apache.beam was included via Google provider dependencies.
This PR filters suspended providers from selected_providers_list_as_string and provider test types using get_suspended_provider_ids().

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[github-actions]

Backport failed to create: v3-1-test. View the failure log Run details

Note: As of Merging PRs targeted for Airflow 3.X
the committer who merges the PR is responsible for backporting the PRs that are bug fixes (generally speaking) to the maintenance branches.

In matter of doubt please ask in #release-management Slack channel.

Status	Branch	Result
❌	v3-1-test

You can attempt to backport this manually by running:

cherry_picker 82e5906 v3-1-test

This should apply the commit to the v3-1-test branch and leave the commit in conflict state marking
the files that need manual conflict resolution.

After you have resolved the conflicts, you can continue the backport process by running:

cherry_picker --continue

If you don't have cherry-picker installed, see the installation guide.