Migrate dev-specific configuration to env vars via .env file #1423

Job	Run time
static-analysis (8.3, cs)	25s
static-analysis (8.3, stan)	40s
static-analysis (8.3, swagger:validate)	14s
api-tests / tests (8.2)	1m 17s
cli-tests / tests (8.2)	36s
api-tests / tests (8.3)	1m 6s
cli-tests / tests (8.3)	34s
api-tests / tests (8.4)	1m 1s
cli-tests / tests (8.4)	35s
unit-tests / tests (8.2)	21s
unit-tests / tests (8.3)	19s
unit-tests / tests (8.4)	19s
db-tests (maria) / db-tests (8.2)	24s
db-tests (ms) / db-tests (8.2)	1m 23s
db-tests (maria) / db-tests (8.3)	32s
db-tests (mysql) / db-tests (8.2)	33s
db-tests (maria) / db-tests (8.4)	28s
db-tests (ms) / db-tests (8.3)	1m 0s
db-tests (mysql) / db-tests (8.3)	29s
db-tests (ms) / db-tests (8.4)	48s
db-tests (mysql) / db-tests (8.4)	29s
db-tests (postgres) / db-tests (8.2)	35s
db-tests (postgres) / db-tests (8.3)	34s
db-tests (sqlite:ci) / db-tests (8.2)	28s
db-tests (postgres) / db-tests (8.4)	26s
db-tests (sqlite:ci) / db-tests (8.3)	18s
db-tests (sqlite:ci) / db-tests (8.4)	23s
upload-coverage	0s
delete-artifacts	0s
	16m 17s

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