refactor(ooniprobe): migrate database to internal (#979)

See https://github.com/ooni/probe/issues/2352

Co-authored-by: decfox <decfox@github.com>
Co-authored-by: Simone Basso <bassosimone@gmail.com>

cmd/ooniprobe/internal/database/migrations/3_results_is_uploaded.sql

@@ -1,15 +0,0 @@
--- +migrate Down
--- +migrate StatementBegin
-
-ALTER TABLE `results`
-DROP COLUMN result_is_uploaded;
-
--- +migrate StatementEnd
-
--- +migrate Up
--- +migrate StatementBegin
-
-ALTER TABLE `results`
-ADD COLUMN result_is_uploaded TINYINT(1) DEFAULT 1 NOT NULL;
-
--- +migrate StatementEnd