chore: don't re-export unstable TransactionManager trait

fix(CHANGELOG): section headings in 0.8.5

Hotfix 0.8.5 (#3824)

fix: correct bugs in MySQL implementation of #[sqlx::test]

fix: correct bugs in MySQL implementation of #[sqlx::test]

feat(ci): run test-attr tests twice to catch #3825

feat(ci): run test-attr tests twice to catch #3825

feat(ci): run test-attr tests twice to catch #3825

feat(ci): run test-attr tests twice to catch #3825

feat(ci): run test-attr tests twice to catch #3825

feat(ci): run test-attr tests again to catch #3825

feat(ci): run test-attr tests again to catch #3825

chore: prepare 0.8.5 release

feat(ci): add functionality tests for sqlx-cli (SQLite)

feat(ci): add functionality tests for sqlx-cli (Postgres)

feat(ci): add functionality tests for sqlx-cli (Postgres)

feat(ci): add functionality tests for sqlx-cli (MySQL)

feat(ci): add functionality tests for sqlx-cli (MySQL)

feat(ci): add functionality tests for sqlx-cli (MySQL)

feat(ci): add functionality tests for sqlx-cli (MySQL)

feat(ci): add functionality tests for sqlx-cli (MySQL)

feat(ci): add functionality tests for sqlx-cli (MySQL)

feat(ci): add functionality tests for sqlx-cli (MySQL)

feat(ci): add functionality tests for sqlx-cli (MySQL)

feat(ci): add functionality tests for sqlx-cli (MySQL)

feat(ci): add functionality tests for sqlx-cli (MySQL)

feat(ci): add functionality tests for sqlx-cli (MySQL)

breaking: delete runtime+TLS combination features

breaking: delete runtime+TLS combination features