add lint: containedctx

[serprex]

Required updating connector interfaces. Bit annoying ctx everywhere, but that's ultimately the correct way. Was running into context complications in #1211 with connector being shared between activities

Putting context in struct essentially makes that struct a context, but this is not the context we necessarily want. For more context, see https://zenhorace.dev/blog/context-control-go

Some changes were made:

1. GetCatalog takes a context now instead of using context.Background()
2. eventhubs processBatch now takes context instead of using context.Background()
3. many instances of Query/Exec in snowflake/clickhouse converted to QueryContext/ExecContext
4. got rid of cancel context in ssh tunnel, context being passed in is sufficient

Followup to #1238