Add MySQL 8.4 LTS and 9.0 support

Base image for `mysql-8` also needs update

mysql                                       8                           736ced9665e8   39 hours ago        583MB
mysql                                       8.4                         736ced9665e8   39 hours ago        583MB
mysql                                       8.0                         0b60ddd8609d   39 hours ago        572MB

Pushed dev image

- added mysql:8.4 image with updated script to use bash while ! echo > /dev/tcp/localhost/3306; do sleep 1; done to wait for port
- updated mysql:8 image inline with 8.4 - transition from mysql_safe and fix encodings dir

Filed core issue for testing new images and daily run or default 📌 Add core testing with Mysql 8.4 LTS Needs review

Looks everything works without extra packages, so we can simplify in follow-up other db-images (no extra dependencies to install)

Got one failure using 9.0 image https://git.drupalcode.org/issue/drupal-3458878/-/jobs/2462104

WARNING: Event retrieved from the cluster: 0/8 nodes are available: 2 node(s) didn't match Pod's node affinity/selector, 6 Insufficient cpu. preemption: 0/8 nodes are available: 2 Preemption is not helpful for scheduling, 6 No preemption victims found for incoming pod..
WARNING: Event retrieved from the cluster: 0/10 nodes are available: 2 node(s) didn't match Pod's node affinity/selector, 2 node(s) had untolerated taint {node.kubernetes.io/not-ready: }, 6 Insufficient cpu. preemption: 0/10 nodes are available: 4 Preemption is not helpful for scheduling, 6 No preemption victims found for incoming pod..
WARNING: Event retrieved from the cluster: 0/10 nodes are available: 1 node(s) had untolerated taint {karpenter.sh/disruption: disrupting}, 2 node(s) didn't match Pod's node affinity/selector, 7 Insufficient cpu. preemption: 0/10 nodes are available: 3 Preemption is not helpful for scheduling, 7 No preemption victims found for incoming pod..
WARNING: Event retrieved from the cluster: 0/9 nodes are available: 2 node(s) didn't match Pod's node affinity/selector, 7 Insufficient cpu. preemption: 0/9 nodes are available: 2 Preemption is not helpful for scheduling, 7 No preemption victims found for incoming pod..
WARNING: Event retrieved from the cluster: 0/10 nodes are available: 1 node(s) had untolerated taint {node.kubernetes.io/not-ready: }, 2 node(s) didn't match Pod's node affinity/selector, 7 Insufficient cpu. preemption: 0/10 nodes are available: 3 Preemption is not helpful for scheduling, 7 No preemption victims found for incoming pod..
WARNING: Event retrieved from the cluster: 0/10 nodes are available: 2 node(s) didn't match Pod's node affinity/selector, 8 Insufficient cpu. preemption: 0/10 nodes are available: 2 Preemption is not helpful for scheduling, 8 No preemption victims found for incoming pod..
Running after_script 00:01
Running after script...

Images are ready

Automatically closed - issue fixed for 2 weeks with no activity.