Add two new columns to connectors for UI to show/hide properties

[travjenkins]

Description:

Added two new columns to the connectors table.

estuary/ui#1194 / #1552
capture_interval
when null the UI will hide the interval input on the Capture edit/create workflow
when a value the UI will show the interval input and default it to the provided value

estuary/ui#1219
disable_backfill
when false the UI will show backfill
when true the UI will hide backfill

Workflow steps:

Run a migration on Supabase

Documentation links affected:

n/a

Notes for reviewers:

Ran supabase stop and supabase start to make sure the script ran

...
Applying migration 48_storage_mapping_directive.sql...
Applying migration 49_tenant_hide_preview.sql...
Applying migration 50_controllers.sql...
Applying migration 51_backfill_controllers.sql...
Applying migration 52_extend_pg_net_timeout.sql...
Applying migration 53_rls_perf.sql...
Applying migration 54_user_info_summary.sql...
Applying migration 55_inferred_schema_triggers.sql...
Applying migration 56_connector_tags_control_flags.sql...
Seeding data supabase/seed.sql...
Started supabase local development setup.
...

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This change is 

[psFried]

Unfortunately, I think you've been led astray by our out-of-date docs on migrations. Sorry. The way to do migrations now is to add a new migration and run alter table commands to add the columns. You might try using the pgadmin workflow from those docs in order to generate the migration, though I'm not sure whether it still works (which is why we switched workflows).

I think we might also want these columns on connector_tags instead of connectors. We have things like autodiscover_interval on connector_tags, and having it there allows us to set it automatically if we ever want to. Would that work from a front-end perspective?

[travjenkins]

Ahhh - I thought that was how we did it but saw when we added GCP stuff we just updated existing migrations.

Yeah - putting them on tags works for me. I was wondering how we'd want to handle if we updated a connector to make things like interval no longer needed.

[psFried]

LGTM, thanks!