.circleci: test the schema_plan flow only for development branches

[datdao]

Do not run integration test for schema flow on master branch because it will break due to "pull request" context

[datdao]

atlas migrate lint on migrations

Status	Step	Result
	No migration files detected
	ERD and visual diff generated	View Visualization
	No issues found	View Report
Read the full linting report on Atlas Cloud

[datdao]

atlas migrate lint on sqlite-wrong-sum

Status	Step	Result
	1 new migration file detected	atlas.sum
	ERD and visual diff generated	View Visualization
	Migration Integrity Check File atlas.sum is invalid	checksum mismatch
Read the full linting report on Atlas Cloud

[datdao]

Atlas detected changes to the desired schema

SQL Plan

-- Create "t1" table
CREATE TABLE "public"."t1" (
  "c1" integer NOT NULL,
  "c2" integer NOT NULL
);
-- Set comment to table: "t1"
COMMENT ON TABLE "public"."t1" IS 'a568a3582f94783074fd4fd05671ac627b681948';

Atlas lint results

Status	Step	Result
	Detect schema changes	2 new statements detected
	No issues found

---

📝 To edit this plan, follow these steps

1. Run atlas schema plan pull --url "atlas://circleci-schema-test/plans/a568a3582f94783074fd4fd05671ac627b681948" > a568a3582f94783074fd4fd05671ac627b681948.plan.hcl
2. Modify the plan.
3. Push the plan using atlas schema plan push --pending --env --file a568a3582f94783074fd4fd05671ac627b681948.plan.hcl