* fix(rowgroup): RGData now uses uint64_t counter for the fixed sizes columns data buf.
The buffer can utilize > 4GB RAM that is necessary for PM side join.
RGData ctor uses uint32_t allocating data buffer.
This fact causes implicit heap overflow.
* feat(bytestream,serdes): BS buffer size type is uint64_t
This necessary to handle 64bit RGData, that comes as
a separate patch. The pair of patches would allow to
have PM joins when SmallSide size > 4GB.
* feat(bytestream,serdes): Distribute BS buf size data type change to avoid implicit data type narrowing
* feat(rowgroup): this returns bits lost during cherry-pick. The bits lost caused the first RGData::serialize to crash a process
when called by proc???. Also made proc??? start/stop SM around
save_brm runs. There seems not to be a saner way to do that atm.
So, on stop/restart/shutdown, it will do
1) stop everything
2) restart SM
3) save_brm
4) stop SM again
in place of an actual StorageManager. The server thread
returns the same error over and over again.
Used that test to debug some basic comm stuff & find
errors in error handling.
