HPCC-30798 Fix potential internal error when large rows serialised in roxie #6690

Job	Run time
Check Skip	17s
Build Docker (ubuntu-23.10, pull_request)	7m 43s
Build Docker (ubuntu-22.04, k8s, true, schedule)	49s
Build Bare Metal (ubuntu-20.04, mono, sudo, -DCMAKE_BUILD_TYPE=RelWithDebInfo -DINCLUDE_PLUGINS=O...	1s
Build Docker (ubuntu-22.04, schedule)	56s
Build Bare Metal (ubuntu-22.04, mono, sudo, -DCMAKE_BUILD_TYPE=RelWithDebInfo -DINCLUDE_PLUGINS=O...	38m 28s
Build Docker (ubuntu-20.04, schedule)	15s
Build Bare Metal (windows-2019, -T host=x64 -A x64 -DUSE_OPTIONAL=OFF -DCLIENTTOOLS_ONLY=ON -DUSE...	4s
Build Docker (centos-8, schedule)	17s
Build Bare Metal (windows-2022, -T host=x64 -A x64 -DUSE_OPTIONAL=OFF -DCLIENTTOOLS_ONLY=ON -DUSE...	14m 5s
Build Docker (centos-7, pull_request, -DVCPKG_TARGET_TRIPLET=x64-centos-7-dynamic)	51m 29s
Build Bare Metal (macos-11, mono, sudo, -DCMAKE_BUILD_TYPE=Release -DUSE_OPTIONAL=OFF -DCLIENTTOO...	3s
Build Docker (amazonlinux, schedule, -DVCPKG_TARGET_TRIPLET=x64-amazonlinux-dynamic)	19s
Build Bare Metal (macos-12, mono, sudo, -DCMAKE_BUILD_TYPE=Release -DUSE_OPTIONAL=OFF -DCLIENTTOO...	13m 46s
Build Docker (centos-7, LN, -DVCPKG_TARGET_TRIPLET=x64-centos-7-dynamic, true, schedule)	54s
	2h 9m 26s

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