Migrate dev-specific configuration to env vars via .env file #1443

Job	Run time
static-analysis (8.3, cs)	36s
static-analysis (8.3, stan)	30s
static-analysis (8.3, swagger:validate)	23s
api-tests / tests (8.2)	1m 12s
cli-tests / tests (8.2)	53s
api-tests / tests (8.3)	1m 25s
unit-tests / tests (8.2)	32s
cli-tests / tests (8.3)	33s
api-tests / tests (8.4)	1m 12s
unit-tests / tests (8.3)	47s
cli-tests / tests (8.4)	32s
unit-tests / tests (8.4)	27s
db-tests (maria) / db-tests (8.2)	39s
db-tests (ms) / db-tests (8.2)	48s
db-tests (maria) / db-tests (8.3)	22s
db-tests (mysql) / db-tests (8.2)	30s
db-tests (ms) / db-tests (8.3)	1m 7s
db-tests (maria) / db-tests (8.4)	25s
db-tests (mysql) / db-tests (8.3)	33s
db-tests (ms) / db-tests (8.4)	47s
db-tests (mysql) / db-tests (8.4)	36s
db-tests (postgres) / db-tests (8.2)	22s
db-tests (sqlite:ci) / db-tests (8.2)	20s
db-tests (postgres) / db-tests (8.3)	34s
db-tests (sqlite:ci) / db-tests (8.3)	22s
db-tests (postgres) / db-tests (8.4)	33s
db-tests (sqlite:ci) / db-tests (8.4)	20s
upload-coverage (8.3)	35s
delete-artifacts	2s
	17m 57s

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