flashers: remove need for heimdall_wait_for_device.sh and fix heimdall-isorec flash

These changes depend on heimdall 2.1.0: https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/69089.

Heimdall 2.1.0 has a new option --wait, which can be used instead of running heimdall_wait_for_device.sh, so this MR simplifies the flash methods accordingly.

We also make use of an update flash script heimdall_flash_isorec_kernel.sh, which takes a fifth argument with device dtb, and use that one for heimdall-isorec flashes. This fixes https://gitlab.com/postmarketOS/boot-deploy/-/issues/26.

pmb/config/__init__.py

@@ -356,7 +356,7 @@ flash_mount_bind = [
 Flasher abstraction. Allowed variables:
 
 $BOOT: Path to the /boot partition
-$DTB: Set to "-dtb" if deviceinfo_append_dtb is set, otherwise ""
+$DTB: Name of device dtb without .dtb extension
 $FLAVOR: Backwards compatibility with old mkinitfs (pma#660)
 $IMAGE: Path to the combined boot/rootfs image
 $IMAGE_SPLIT_BOOT: Path to the (split) boot image
@@ -421,16 +421,16 @@ flashers: dict[str, dict[str, bool | list[str] | dict[str, list[list[str]]]]] =
         "actions": {
             "list_devices": [["heimdall", "detect"]],
             "flash_rootfs": [
-                ["heimdall_wait_for_device.sh"],
-                ["heimdall", "flash", "--$PARTITION_ROOTFS", "$IMAGE"],
+                ["heimdall", "flash", "--wait", "--$PARTITION_ROOTFS", "$IMAGE"],
             ],
             "flash_kernel": [
                 [
-                    "heimdall_flash_kernel.sh",
+                    "heimdall_flash_isorec_kernel.sh",
                     "$BOOT/initramfs$FLAVOR",
                     "$PARTITION_INITFS",
-                    "$BOOT/vmlinuz$FLAVOR$DTB",
+                    "$BOOT/vmlinuz$FLAVOR",
                     "$PARTITION_KERNEL",
+                    "$BOOT/$DTB",
                 ]
             ],
         },
@@ -442,14 +442,21 @@ flashers: dict[str, dict[str, bool | list[str] | dict[str, list[list[str]]]]] =
         "actions": {
             "list_devices": [["heimdall", "detect"]],
             "flash_rootfs": [
-                ["heimdall_wait_for_device.sh"],
-                ["heimdall", "flash", "--$PARTITION_ROOTFS", "$IMAGE", "$NO_REBOOT", "$RESUME"],
+                [
+                    "heimdall",
+                    "flash",
+                    "--wait",
+                    "--$PARTITION_ROOTFS",
+                    "$IMAGE",
+                    "$NO_REBOOT",
+                    "$RESUME",
+                ],
             ],
             "flash_kernel": [
-                ["heimdall_wait_for_device.sh"],
                 [
                     "heimdall",
                     "flash",
+                    "--wait",
                     "--$PARTITION_KERNEL",
                     "$BOOT/boot.img$FLAVOR",
                     "$NO_REBOOT",
@@ -478,10 +485,10 @@ flashers: dict[str, dict[str, bool | list[str] | dict[str, list[list[str]]]]] =
                 ["rm", "-f", "/vbmeta.img"],
             ],
             "flash_lk2nd": [
-                ["heimdall_wait_for_device.sh"],
                 [
                     "heimdall",
                     "flash",
+                    "--wait",
                     "--$PARTITION_KERNEL",
                     "$BOOT/lk2nd.img",
                     "$NO_REBOOT",