### What changes were proposed in this pull request?
1, add new param blockSize;
2, add a new class InstanceBlock;
3, if blockSize==1, keep original behavior; if blockSize>1, stack input vectors to blocks (like ALS/MLP);
4, if blockSize>1, standardize the input outside of optimization procedure;
### Why are the changes needed?
it will obtain performance gain on dense datasets, such as epsilon
1, reduce RAM to persist traing dataset; (save about 40% RAM)
2, use Level-2 BLAS routines; (~10X speedup)
### Does this PR introduce _any_ user-facing change?
Yes, a new param is added
### How was this patch tested?
existing and added testsuites
Closes#28473 from zhengruifeng/blockify_aft.
Authored-by: zhengruifeng <ruifengz@foxmail.com>
Signed-off-by: zhengruifeng <ruifengz@foxmail.com>
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