kernel: config: 6.6: disable ZSTD debug info compression by default

When kernel 6.6 is being compiled with GCC13 it will prompt for:
Compressed Debug information
> 1. Don't compress debug information (DEBUG_INFO_COMPRESSED_NONE)
  2. Compress debugging information with zlib (DEBUG_INFO_COMPRESSED_ZLIB)
  3. Compress debugging information with zstd (DEBUG_INFO_COMPRESSED_ZSTD) (NEW)

This is because kernel now also has support for compressing debug info
with ZSTD, so add the missing symbol and disable it by default.

Signed-off-by: Robert Marko <robimarko@gmail.com>

target/linux/generic/config-6.6

@@ -1412,6 +1412,7 @@ CONFIG_DEBUG_FS_ALLOW_ALL=y
 # CONFIG_DEBUG_INFO_BTF is not set
 CONFIG_DEBUG_INFO_COMPRESSED_NONE=y
 # CONFIG_DEBUG_INFO_COMPRESSED_ZLIB is not set
+# CONFIG_DEBUG_INFO_COMPRESSED_ZSTD is not set
 # CONFIG_DEBUG_INFO_DWARF4 is not set
 # CONFIG_DEBUG_INFO_DWARF5 is not set
 CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y