chore: replace dependabot with renovate #934

Job	Run time
Front-end unit tests	44s
php8.1-sqlite integration tests	2m 11s
php8.1-oci integration tests	4m 0s
php8.0-pgsql integration tests	3m 5s
Nextcloud master php8.0 unit tests	34s
php8.0-pgsql integration tests	2m 2s
Nextcloud stable27 php8.0 unit tests	2m 25s
php8.2-mysql integration tests	5m 14s
Nextcloud stable26 php8.0 unit tests	2m 40s
php7.4-mysql integration tests	1m 58s
Nextcloud master php8.1 unit tests	1m 1s
Nextcloud stable27 php8.1 unit tests	59s
Nextcloud stable26 php8.1 unit tests	1m 18s
Nextcloud master php8.2 unit tests	2m 18s
Nextcloud stable27 php8.2 unit tests	44s
Nextcloud stable26 php8.2 unit tests	41s
Nextcloud stable25 php7.4 unit tests	2m 58s
Nextcloud stable25 php8.0 unit tests	2m 38s
Nextcloud stable25 php8.1 unit tests	49s
	38m 19s

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