Add Drone php8.0 pipelines for MariaDB10.4, MySQL8, PGSQL13

[solracsf]

Add Drone php8.0 pipelines for MariaDB10.4, MySQL8, PGSQL13

[PVince81]

👍 and CI is green minus the usual random fail

[nickvergessen]

With 8.1 coming up, I think it's more likely the time to reduce the pipeline.

How likely is it that something works on mariaDB/mysql with 3 different php versions but not with 1 other?

So my suggestion is:

DB	DB version	PHP version	Future
MariaDB	10.1	7.3
MariaDB	10.4	7.4	❌
MariaDB	10.4	8.0
MariaDB	10.4	8.1	🔜 don't add ❌
MySQL	8.0	7.4
MySQL	8.0	8.0	❌
MySQL	8.0	8.1	🔜
Postgres	9.6	7.3
Postgres	11	7.4
Postgres	12	7.4	❌
Postgres	13	7.4	❌
Postgres	13	8.0
Postgres	13	8.1	🔜

This way Postgres is tested on each PHP version once,
MySQL/MariaDB are tested on either PHP version respectively.
Should be good enough, wihtout growing the table (and therefor time) over the top

[solracsf]

@nickvergessen tell me what you think. This should cover almost all possibilities (php8.1 not added yet).

[solracsf]

@skjnldsv backport?