Added asserts to e2e tests to verify that the backup groups get deleted

# Version changelog

## 0.4.0

* Added exception handling for secret scope not found.
([#418](#418)).
* Added a crawler for creating an inventory of Azure Service Principals
([#326](#326)).
* Added check if account group already exists during failure recovery
([#446](#446)).
* Added checking for index out of range.
([#429](#429)).
* Added hyperlink to UCX releases in the main readme
([#408](#408)).
* Added integration test to check backup groups get deleted
([#387](#387)).
* Added logging of errors during threadpool operations.
([#376](#376)).
* Added recovery mode for workspace-local groups from temporary groups
([#435](#435)).
* Added support for migrating Legacy Table ACLs from workspace-local to
account-level groups
([#412](#412)).
* Added detection for installations of unreleased versions
([#399](#399)).
* Decoupled `PermissionsManager` from `GroupMigrationToolkit`
([#407](#407)).
* Enabled debug logging for every job task run through a file, which is
accessible from both workspace UI and Databricks CLI
([#426](#426)).
* Ensured that table exists, even when crawlers produce zero records
([#373](#373)).
* Extended test suite for HMS->HMS TACL migration
([#439](#439)).
* Fixed handling of secret scope responses
([#431](#431)).
* Fixed `crawl_permissions` task to respect 'workspace_start_path'
config ([#444](#444)).
* Fixed broken logic in `parallel` module and applied hardened error
handling design for parallel code
([#405](#405)).
* Fixed codecov.io reporting
([#403](#403)).
* Fixed integration tests for crawlers
([#379](#379)).
* Improved README.py and logging messages
([#433](#433)).
* Improved cleanup for workspace backup groups by adding more retries on
errors ([#375](#375)).
* Improved dashboard queries to show unsupported storage types.
([#398](#398)).
* Improved documentation for readme notebook
([#257](#257)).
* Improved test coverage for installer
([#371](#371)).
* Introduced deterministic `env_or_skip` fixture for integration tests
([#396](#396)).
* Made HMS & UC fixtures return `CatalogInfo`, `SchemaInfo`, and
`TableInfo` ([#409](#409)).
* Merge `workspace_access.Crawler` and `workspace_access.Applier`
interfaces to `workspace_access.AclSupport`
([#436](#436)).
* Moved examples to docs
([#404](#404)).
* Properly isolated integration testing for workflows on an existing
shared cluster ([#414](#414)).
* Removed thread pool for any IAM Group removals and additions
([#394](#394)).
* Replace plus char with minus in version tag for GCP dev installation
of UCX ([#420](#420)).
* Run integration tests on shared clusters for a faster devloop
([#397](#397)).
* Show difference between serverless and PRO warehouses during
installation ([#385](#385)).
* Split `migrate-groups` workflow into three different stages for
reliability ([#442](#442)).
* Use groups instead of usernames in code owners file
([#389](#389)).

Added asserts to e2e tests to verify that the backup groups get deleted

# Version changelog

## 0.4.0

* Added exception handling for secret scope not found.
([#418](#418)).
* Added a crawler for creating an inventory of Azure Service Principals
([#326](#326)).
* Added check if account group already exists during failure recovery
([#446](#446)).
* Added checking for index out of range.
([#429](#429)).
* Added hyperlink to UCX releases in the main readme
([#408](#408)).
* Added integration test to check backup groups get deleted
([#387](#387)).
* Added logging of errors during threadpool operations.
([#376](#376)).
* Added recovery mode for workspace-local groups from temporary groups
([#435](#435)).
* Added support for migrating Legacy Table ACLs from workspace-local to
account-level groups
([#412](#412)).
* Added detection for installations of unreleased versions
([#399](#399)).
* Decoupled `PermissionsManager` from `GroupMigrationToolkit`
([#407](#407)).
* Enabled debug logging for every job task run through a file, which is
accessible from both workspace UI and Databricks CLI
([#426](#426)).
* Ensured that table exists, even when crawlers produce zero records
([#373](#373)).
* Extended test suite for HMS->HMS TACL migration
([#439](#439)).
* Fixed handling of secret scope responses
([#431](#431)).
* Fixed `crawl_permissions` task to respect 'workspace_start_path'
config ([#444](#444)).
* Fixed broken logic in `parallel` module and applied hardened error
handling design for parallel code
([#405](#405)).
* Fixed codecov.io reporting
([#403](#403)).
* Fixed integration tests for crawlers
([#379](#379)).
* Improved README.py and logging messages
([#433](#433)).
* Improved cleanup for workspace backup groups by adding more retries on
errors ([#375](#375)).
* Improved dashboard queries to show unsupported storage types.
([#398](#398)).
* Improved documentation for readme notebook
([#257](#257)).
* Improved test coverage for installer
([#371](#371)).
* Introduced deterministic `env_or_skip` fixture for integration tests
([#396](#396)).
* Made HMS & UC fixtures return `CatalogInfo`, `SchemaInfo`, and
`TableInfo` ([#409](#409)).
* Merge `workspace_access.Crawler` and `workspace_access.Applier`
interfaces to `workspace_access.AclSupport`
([#436](#436)).
* Moved examples to docs
([#404](#404)).
* Properly isolated integration testing for workflows on an existing
shared cluster ([#414](#414)).
* Removed thread pool for any IAM Group removals and additions
([#394](#394)).
* Replace plus char with minus in version tag for GCP dev installation
of UCX ([#420](#420)).
* Run integration tests on shared clusters for a faster devloop
([#397](#397)).
* Show difference between serverless and PRO warehouses during
installation ([#385](#385)).
* Split `migrate-groups` workflow into three different stages for
reliability ([#442](#442)).
* Use groups instead of usernames in code owners file
([#389](#389)).