MLECO-5655: Updating to 25.02 dependencies

Updating third party dependencies to 25.02 versions. The
full list can be found here:
https://gitlab.arm.com/artificial-intelligence/ethos-u/ethos-u/-/blob/9c339ddd5369e37ed554f7e39647f4e0967a3e2d/25.02.json

Remote URLs for core-driver and core-platform have been
updated to track these sources from https://gitlab.arm.com/


as mlplatform is a read-only mirror for now and will not
have any new changes.

+--------------+------------------------------------------+
| Dependency   |  Commit/Tag                              |
+--------------+------------------------------------------+
|avh           | 925049e8ab010388e48fab01fc0411cd9bd38899 |
|cmsis-6       | 1a1799c6c58c47e737bb19523483344a25d29895 |
|cmsis-nn      | e096196a0c49f065abc03d943c583cd50de424ba |
|core-driver   | 25.02                                    |
|core-platform | 25.02                                    |
|tensorflow    | ef64591270691022a329cf04ba9e73ecfb15ddb8 |
+--------------+------------------------------------------+

Vela version used by default has been bumped to 4.2.0.

Dependencies not updated with this change:

* cmsis-dsp: `v1.16.2` is still the latest stable release
* cortex-dfp: No major source change to current `c2c70a97`

Change-Id: If5eccbb509e919dd9d101957d0915116a4e036e5
Signed-off-by: Kshitij Sisodia <kshitij.sisodia@arm.com>