app/prj.conf: stop forcing CONFIG_OUTPUT_DISASSEMBLY=y

This reverts 8f60180 ("app: enable OUTPUT_DISASSEMBLY for Zephyr
builds")

The disassembly is useful in some contexts but can't be parallelized and
takes an enormous amount of time. On my system OUTPUT_DISASSEMBLY
almost doubles the compilation time!

Quoting Zephyr commit cc5763344709:

> This on-by-default option takes the majority of "link" time. If people
> need the disassembly, they can turn it on.

Signed-off-by: Marc Herbert <marc.herbert@intel.com>

app/prj.conf

@@ -9,9 +9,6 @@ CONFIG_BUILD_OUTPUT_BIN=n
 # and usage in xtensa-build-zephyr.py
 CONFIG_BUILD_OUTPUT_STRIPPED=y
 
-# Generate zephyr.lst file
-CONFIG_OUTPUT_DISASSEMBLY=y
-
 CONFIG_HAVE_AGENT=n
 
 # Since Zephyr commit f0daf904bb0202c PICOLIBC is the new default.

scripts/xtensa-build-zephyr.py

@@ -943,7 +943,7 @@ class InstFile:
 		InstFile("include/generated/sof_versions.h", "sof_versions.h",
 			 gzip=False, txt=True),
 		InstFile(BIN_NAME + ".elf"),
-		InstFile(BIN_NAME + ".lst", txt=True),
+		InstFile(BIN_NAME + ".lst", txt=True, optional=True),
 		InstFile(BIN_NAME + ".map", txt=True),
 
 		# CONFIG_BUILD_OUTPUT_STRIPPED