configs/beagleplay_defconfig: bump linux to 6.18.16 and u-boot to 2026.01

This commit:
    - updates the Kernel from 6.10 to 6.18.16
    - updates U-Boot from 2024.07 to 2026.01
    - updates arm-trusted-firmware from v2.11 to v2.12 LTS
    - switches to Bootlin external glibc stable toolchain

Replace OP-TEE TEE binary file tee-pager_v2.bin by tee-raw.bin using
the new option BR2_TARGET_UBOOT_NEEDS_OPTEE_TEE_RAW_BIN.

Remove unsued linux-headers.hash since we now use a prebuilt toolchain.

Signed-off-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Julien Olivain <ju.o@free.fr>

board/beagleboard/beagleplay/patches/arm-trusted-firmware/arm-trusted-firmware.hash

@@ -1,2 +0,0 @@
-# Locally calculated
-sha256  c0f23ccc71c49989e9ad238acf334473c17b7c88f79a20c829c3d443e3794a22  arm-trusted-firmware-v2.11-git4.tar.gz

board/beagleboard/beagleplay/patches/linux-headers/linux-headers.hash

@@ -1 +0,0 @@
-../linux/linux.hash

board/beagleboard/beagleplay/patches/linux/linux.hash

@@ -1,2 +1,2 @@
-# Locally calculated
-sha256  774698422ee54c5f1e704456f37c65c06b51b4e9a8b0866f34580d86fef8e226  linux-6.10.tar.xz
+# From https://www.kernel.org/pub/linux/kernel/v6.x/sha256sums.asc
+sha256  4f21c01f4d04c1d1b3ed794153f8900802c92497be620b07c4869530f2d28ee3  linux-6.18.16.tar.xz

board/beagleboard/beagleplay/patches/uboot/uboot.hash

@@ -1,2 +1,2 @@
 # Locally calculated
-sha256  f591da9ab90ef3d6b3d173766d0ddff90c4ed7330680897486117df390d83c8f  u-boot-2024.07.tar.bz2
+sha256  b60d5865cefdbc75da8da4156c56c458e00de75a49b80c1a2e58a96e30ad0d54  u-boot-2026.01.tar.bz2