Removed mysql and pgsql backends (canonical#30)

[backport/k8s-dqlite#83] Rewritten list query, test and fix (canonical#31)

Update to the latest go-dqlite

Update go.mod (canonical#27)

Signed-off-by: Cole Miller <[email protected]>

Table index migration (canonical#28)

Fix the DELETE AS error

Schema incremental improve (canonical#19)

Only enforce RangeEnd + Limit restriction when RangeEnd is set (canon…

…ical#11)

fix delete responses (canonical#9)

Add more retriable dqlite errors (canonical#8)

Add Status DbSize support for apiserver etcd metrics (canonical#7)

This cherry-picks changes from [0], only for the parts related to sqlite/dqlite

[0]: k3s-io@92fcaea