Backups filenames missing timestamp as of v3.8.0

[tpansino]

Summary

Backups filenames are missing the timestamp as of v3.8.0

Steps to reproduce

1. Make a backup of a SQLite database with the default settings. (Based on the code I think this is also affecting InfluxDB and MSSQL, but didn't test those)
2. Observe the backup file has no timestamp in the name (eg: sqlite3_db.sqlite3.xz), and consequently there is no retention of previous backup files.

What is the expected correct behavior?

Backup file should have a timestamp in the name, and a new backup file should be present after each run.

Relevant logs and/or screenshots

** Performing Manual Backup
2023-04-11.22:27:49 [NOTICE] ** [db-backup] Dumping sqlite3 database: '/db.sqlite' and compressing with 'xzip'
2023-04-11.22:27:49 [INFO] ** [db-backup] DB Backup of 'sqlite3_db.sqlite3.xz' completed successfully
2023-04-11.22:27:53 [NOTICE] ** [db-backup] Backup of sqlite3_db.sqlite3.xz created with the size of 37709892 bytes
mv: can't rename '/tmp/backups/*.': No such file or directory
ln: /backup/latest-sqlite3__/db.sqlite: No such file or directory
2023-04-11.22:27:53 [NOTICE] ** [db-backup] DB Backup for 'db' time taken: Hours: 0 Minutes: 00 Seconds: 04
2023-04-11.22:27:53 [INFO] ** [db-backup] Backup routines finish time: 2023-04-11 22:27:53 GMT with overall exit code 0
2023-04-11.22:27:53 [NOTICE] ** [db-backup] Backup routines time taken: Hours: 0 Minutes: 00 Seconds: 04
2023-04-11.22:27:53 [INFO] ** [db-backup] Cleaning up old backups on filesystem

Environment

• Image version / tag: any version since v3.8.0
• Host OS: Ubuntu 22.04

docker-compose.yml

backup: container_name: backup image: tiredofit/db-backup:latest restart: on-failure:5 volumes: - /db.sqlite3:/db.sqlite:ro - /backups:/backup environment: COMPRESSION: "xz" DB_TYPE: "sqlite" DB_HOST: "/db.sqlite" DB_DUMP_BEGIN: "0801" DB_CLEANUP_TIME: "14400" ENABLE_CHECKSUM: "false" CONTAINER_ENABLE_MONITORING: "false"

Possible fixes

Looks to me like there are several ltarget variables not set properly in install/assets/functions/10-db-backup for the 3 DB types I mentioned above. I'll open a PR.