west.yml: MCUboot synchronization from upstream

[nordicjm]

Update Zephyr fork of MCUboot to revision:
e890df7ab975da181a9f3fb3abc470bf935625ab

Brings following Zephyr relevant fixes:

• e890df7a boot: zephyr: Add ESP32C2/ESP8684 support
• 5d5f0492 bootutil: Fix AES and SHA-256 contexts not with mbedTLS
• ca06b9fe boot: zephyr: Add fallback to USB DFU
• 43a49a3b bootutil: Add better mode selection checks
• 956311d2 boot: Make boot_enc_valid take slot instead of image index
• 242db1a9 boot: zephyr: boards: Add nrf54l15dk configuration
• 651775b5 boot: zephyr: board: Fix nrf54l15pdk Kconfig fragment
• a3762626 boot: zephyr: MCXN947 currently only does not support swap mode

Notes on process:

1. The MCUboot update from mcu-tools/mcuboot/main with the SHA used in west.yaml is already synchronized to zephyrproject-rtos/mcuboot/upstream-sync branch, and is available in the Zephyr fork of MCUboot.
2. The [DNM] on this PR should be kept until the PR passes all tests and is accepted.
3. Once the PR passes all tests and gets accepted, the upstream-sync branch should be fast-forward merged to zephyrproject-rtos/mcuboot/main branch and [DNM] should be removed.
4. After the main branch gets updated, this PR does not require further changes and should be merged as is.

[zephyrbot]

The following west manifest projects have been modified in this Pull Request:

Name	Old Revision	New Revision	Diff
mcuboot	zephyrproject-rtos/mcuboot@52e2afc	zephyrproject-rtos/mcuboot@e890df7 (upstream-sync)	zephyrproject-rtos/[email protected]

Note: This message is automatically posted and updated by the Manifest GitHub Action.