* Use git submodules for (securely) using third party Github Actions

List of repositories added as submodules:

EndBug/latest-tag@latest
morrisoncole/pr-lint-action@v1.4.1
trilom/file-changes-action@v1.2.4
styfle/cancel-workflow-action@0.6.0
apache-superset/cached-dependencies@b90713b
unsplash/comment-on-pr@v1.2.0

* fix(multiline): return chart data on data request

* bump package

* optimize chart retrieval and fix chart form_data

* Reset column field for removed dataset

* Fix issue with cleaning exisiting field

* Fix lint error and remove unnecessary import

* Change message text for wrong filter

* Add Basic Error Alert component

* Fix hiding error after filter correction

* Fix UI for long native filters names

* Add Filter width const

* Refactor Filter Bar and Config Modal

* Break word for long Filter Control titles

* Show incompatible native filters indicator

* Add Native Filters mocks and tests to Filter Badge

* Compare filter names in deduplication logic

* Add indicator key

* Remove unnecessary import

* fix(load_examples): better fix for load_data

* Address changes

1. Upgrade match-sorter from 4.1.0 to 6.1.0
2. Add a debounce delay of 200 milliseconds to reduce excessive rendering (and searching)
3. Set keepDiacritics to true to improve performance
4. Display count of filtered results in "Showing x of xx", instead of the total results
5. Rank certified metrics to the top

* feat: add decorator to guard public APIs

* Add unit tests

* Refactor to use unit tests

* Paramterize tests

* Remove decorator

The connection prefix should be different if the DB2 dialect is different.

* fix: various style touch on Explore page

* More style fixes

* Force 100% height for sidebars

* Fix linting

* fix bar chart order

* fix test_explore_json_dist_bar_order

* fix quotes

Co-authored-by: NBryan Keller <bkeller@netflix.com>

* Fix error message not displayed correctly in Timeseries table chart

* Fix lint error

* test get_table_names

* test _get_full_name

* add test_split_data_type

* test _show_columns

* add test_is_column_name_quoted

* test select_star

* test get_view_names

* test estimate_statement_cost

* test get_all_datasource_names

* test get_create_view

* test _extract_error_message

* fix typo

* Add deprecation notice to superset.tasks.schedules

* Reduce retries and schedule window for alerts