count distinct support prefetch

[guo-shaoge]

What problem does this PR solve?

Issue Number: close #9901

Problem Summary:

workload: tpch50g
2 tiflash(16c) on benchbot
queries:

explain analyze select count(distinct L_SUPPKEY) from lineitem;
explain analyze select count(distinct L_ORDERKEY) from lineitem;
explain analyze select count(distinct L_EXTENDEDPRICE, L_QUANTITY) from lineitem;
explain analyze select count(distinct L_ORDERKEY, L_TAX) from lineitem;
explain analyze select count(distinct L_SHIPINSTRUCT) from lineitem;
explain analyze select count(distinct L_COMMENT) from lineitem;

HashTable Key	nightly	opt-no_prefetch	opt-prefetch_16	rate-opt-no_prefetch	rate-opt-prefetch_16
key_int64 (unary)	0.5	0.49	0.5	2.00%	0.00%
	1.45	1.34	1.34	7.59%	7.59%
key_string (variadic-2 Int64)	1.65	1.61	1.63	2.42%	1.21%
	6.00	5.28	4.59	12.00%	23.50%
key_string (unary)	0.58	0.56	0.56	3.45%	3.45%
	8.91	8.71	8.32	2.24%	6.62%

What is changed and how it works?

1. add addBatchSinglePlace() for AggregateFunctionUniq and AggregateFunctionUniqVariadic
2. updateHashWithValues support compute hash from specific row instead of the whole column

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

None

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Test name	Commit	Details	Required	Rerun command
pull-unit-test	a47a9a7	link	true	/test pull-unit-test

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