MLECO-6135: Update MLEK dependencies to 25.05 components

Updating third party dependencies to 25.05 versions. The full list
can be found here:
https://gitlab.arm.com/artificial-intelligence/ethos-u/ethos-u/-/blob/main/25.05.json



+-------------------+------------------------------------------+
| Dependency        | Commit/Tag                               |
+-------------------+------------------------------------------+
| cmsis-6           | efba702bbdb5610e866a745740fdf68f2d4d4af5 |
| cmsis-nn          | 1438b3328d7f910423a7057f1abcb6d6576325f2 |
| core-driver       | 25.05                                    |
| core-platform     | 25.05                                    |
| cortex-dfp        | 36d0d3b118ab8493865044551d05248a5fe53427 |
| tensorflow        | 9d35a74b03fa313026982abb4d2c4ffe29de88bc |
+-------------------+------------------------------------------+

Vela version used by default has been bumped to 4.3.0.

Dependencies not updated with this change:
* cmsis-dsp: `v1.16.2` is still the latest stable release.
* avh: No major updates since 925049e8.

Change-Id: I21acdff4880f3ea634e398a5bf9ed9adaf36cdf9
Signed-off-by: Vivek Choradia <vivek.choradia@arm.com>
Signed-off-by: Alex Tawse <alex.tawse@arm.com>