Preparing for OP-TEE 4.10.0

[BCC all OP-TEE maintainers]

Hi OP-TEE maintainers & contributors,

OP-TEE version 4.10.0 is now scheduled for release on 2026-04-17. So,
now is a good time to start testing the master branch across various
platforms and report or fix any bugs.

The GitHub pull request for collecting Tested-by tags or any other
comments is https://github.com/OP-TEE/optee_os/pull/7753.

We will create the release candidate tag 4.10.0-rc1 this Friday, April 3.

You can find more information related to releases here:
https://optee.readthedocs.io/en/latest/general/releases.html

Thanks,
Jens