rcc

chore: Extract `mariadb_default_args` #1497

Job	Run time
Smoke test: stock R	3m 31s
windows-latest (release)	10m 13s
macos-latest (release)	11m 18s
windows-latest (4.1)	11m 21s
pkgdown	2m 22s
ubuntu-20.04 (release)	4m 30s
windows-latest (4.2)	9m 8s
ubuntu-22.04 (devel)	5m 5s
ubuntu-22.04 (release) with covr	6m 8s
ubuntu-22.04 (oldrel-1)	3m 53s
ubuntu-22.04 (oldrel-2)	4m 11s
ubuntu-22.04 (oldrel-3)	5m 21s
ubuntu-22.04 (oldrel-4)	3m 18s
macOS-latest (release) mariadb_config	6m 29s
macOS-latest (release) mysql_config	6m 54s
ubuntu-22.04 (release) MySQL server + client	4m 47s
ubuntu-22.04 (release) MariaDB server, MySQL client	3m 35s
ubuntu-22.04 (release) MySQL server, MariaDB client	4m 5s
ubuntu-22.04 (release) MariaDB server + client	3m 18s
	1h 49m 27s

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