drop colossalai from testing as no stable release yet (#16122)

Author: Borda

requirements/pytorch/strategies.txt

@@ -1,7 +1,7 @@
 # NOTE: the upper bound for the package version is only set for CI stability, and it is dropped while installing this package
 #  in case you want to preserve/enforce restrictions on the latest compatible version, add "strict" as an in-line comment
 
-colossalai>=0.1.10
+# colossalai>=0.1.10  # TODO: uncomment when there's a stable version released
 fairscale>=0.4.5, <0.4.13
 deepspeed>=0.6.0, <=0.7.0
 hivemind==1.1.2; sys_platform == 'linux'