feat(l1,l2): make dev mode always use in memory db

[fedacking]

Motivation

We want the dev mode to use the in memory db for development work.

Description

• Changed the init_l1 to use inmemory db if the dev option is on and the feature is enabled

[github-actions]

Lines of code report

Total lines added: 21
Total lines removed: 0
Total lines changed: 21

Detailed view

+--------------------------------------+-------+------+
| File                                 | Lines | Diff |
+--------------------------------------+-------+------+
| ethrex/cmd/ethrex/cli.rs             | 768   | +8   |
+--------------------------------------+-------+------+
| ethrex/cmd/ethrex/l2/initializers.rs | 334   | +1   |
+--------------------------------------+-------+------+
| ethrex/cmd/ethrex/utils.rs           | 175   | +12  |
+--------------------------------------+-------+------+

[mpaulucci]

instead of always, I would specify in memory by default. Also, I would set the default at the cli level, not here.

[fedacking]

closed in favour of #5363