build,win: remove LTO parallelisation limit - #65535
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Signed-off-by: StefanStojanovic <stefan.stojanovic@janeasystems.com>
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This PR basically reverts the LTO parallelism limitation for release builds added when enabling LTO on Windows. The root cause (OOM) was resolved in the release CI machines, so full parallelisation is now possible. As a result, release CI builds will be faster. The limit option is not removed, as it may become useful in the future; it just won't be used after this PR lands.
Refs: #63114