[CK_TILE] Change output accum tensor layout of fmha fwd split-kv & combine kernels (#1527)

* Use same layout for o_acc and o tensor

* Use better param names in partitioner

* Remove redundant kargs 'max_seqlen_q'

* Use better param names in splitkv kernel

* Add comment for additional kernel arguments

* Sync empty loop early return logics between pipelines

* Pass more arguments to cmake in scripts

* Align backslashes

* Fix wrong o_acc tensor view strides

* Change o_acc layout if o_perm=0

* Handle whole row masked via attn_bias

* Use use vector width = 1 for o_acc

* Use more even split sizes

script/cmake-ck-dev.sh

@@ -7,8 +7,10 @@ MY_PROJECT_SOURCE=$1
 
 if [ $# -ge 2 ] ; then
     GPU_TARGETS=$2
+    REST_ARGS=${@:3}
 else
     GPU_TARGETS="gfx908;gfx90a;gfx940"
+    REST_ARGS=
 fi
 
 cmake                                                                                             \
@@ -20,4 +22,5 @@ cmake
 -D GPU_TARGETS=$GPU_TARGETS                                                                       \
 -D CMAKE_VERBOSE_MAKEFILE:BOOL=ON                                                                 \
 -D USE_BITINT_EXTENSION_INT4=OFF                                                                  \
+$REST_ARGS                                                                                        \
 ${MY_PROJECT_SOURCE}