fix: support longer index and table names

[susnux]

Summary

If Oracle is not explicitly disabled by an app we check the table names / key names / column names for legacy Oracle length of max. 30 characters. But since Oracle 12c the limit was increased to 128 characters.

So nowadays we are limited by MySQL / Mariadb and Postgres:

• MySQL / MariaDB: 64 characters
• Postgres: 63 characters
• SQLite: unlimited
• Oracle: 128 characters

This PR adjusts the checks to only check for Oracle specific behavior but limit the name length to 63.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• [x] Tests (unit, integration, api and/or acceptance) are included
• [x] Screenshots before/after for front-end changes
• [ ] Documentation (manuals or wiki) has been updated or is not required
• [x] Backports requested where applicable (ex: critical bugfixes)

[susnux]

Oracle 11 is no longer supported. So I rebased this and resolved the conflicts with recent changes of @CarlSchwan regarding support not null boolean values.