Clean up webserver config

[bbovenzi]

For Airflow 3, we should take a look at which config & settings fields that we want to keep or remove. Particularly for the webserver.

Config we should remove:

• dag_default_view: Unnecessary with new designs
• dag_orientation: Better to customize in the UI (either changes dag to dag, or part of i18n)
• grid_view_sorting_order: Better to customize in the UI. Matters more on a dag to dag level
• default_dag_run_display_number: Better for the UI to decide
• default_wrap: same as dag_orientation
• show_recent_stats_for_completed_runs: Unnecessary with new designs
• default_ui_timezone: we should default to the system timezone
• log_fetch_*: we should just use the auto_refresh_interval
• log_animation_speed: Better for the UI to decide
• navbar_logo_text_color: this doesn't exist anymore
• show_trigger_form_if_no_params We'll always have a confirm step

Settings we should remove:

• STATE_COLORS: current colors don't work well in both light and dark mode. Doesn't allow individual users to customize to what they personally can see best

Dag fields to remove:

• orientation
• default_views

Task fields to remove:

• ui_color
• ui_fgcolor: I know some people like these, but having both state and operator colors gets too loud and unusable too fast

[kaxil]

Nice, a lot of cleanup! but I assume this can happen once we remove the airflow/www dir