Migrate dev-specific configuration to env vars via .env file #1439

Job	Run time
static-analysis (8.3, cs)	45s
static-analysis (8.3, stan)	32s
static-analysis (8.3, swagger:validate)	13s
api-tests / tests (8.2)	1m 49s
api-tests / tests (8.3)	1m 26s
api-tests / tests (8.4)	1m 12s
cli-tests / tests (8.2)	34s
cli-tests / tests (8.3)	37s
cli-tests / tests (8.4)	50s
unit-tests / tests (8.2)	27s
unit-tests / tests (8.3)	38s
unit-tests / tests (8.4)	44s
db-tests (maria) / db-tests (8.2)	1m 20s
db-tests (ms) / db-tests (8.2)	1m 18s
db-tests (maria) / db-tests (8.3)	1m 3s
db-tests (ms) / db-tests (8.3)	46s
db-tests (maria) / db-tests (8.4)	33s
db-tests (ms) / db-tests (8.4)	47s
db-tests (mysql) / db-tests (8.2)	33s
db-tests (postgres) / db-tests (8.2)	33s
db-tests (mysql) / db-tests (8.3)	33s
db-tests (mysql) / db-tests (8.4)	52s
db-tests (postgres) / db-tests (8.3)	25s
db-tests (postgres) / db-tests (8.4)	46s
db-tests (sqlite:ci) / db-tests (8.2)	31s
db-tests (sqlite:ci) / db-tests (8.3)	29s
db-tests (sqlite:ci) / db-tests (8.4)	18s
upload-coverage (8.3)	30s
delete-artifacts	1s
	21m 5s

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