Merge changes from topic "for-lts-v2.12.3" into lts-v2.12

* changes:
  feat(mbedtls): update mbedtls to version 3.6.3
  feat(mbedtls): update mbedtls to version 3.6.3
  feat(mbedtls): update minimum version to latest MbedTLS v3.6.2
  feat(lib): add mbedtls support
  feat(realm): add MbedTLS as submodule