[CORE] Make it clear that expand-partitioning only involves in inner-like joins

[zhztheplayer]

Related to #4342, make code clearer

[github-actions]

Thanks for opening a pull request!

Could you open an issue for this pull request on Github Issues?

https://github.com/oap-project/gluten/issues

Then could you also rename commit message and pull request title in the following format?

[GLUTEN-${ISSUES_ID}][COMPONENT]feat/fix: ${detailed message}

See also:

• Other pull requests

[github-actions]

Run Gluten Clickhouse CI

[GlutenPerfBot]

===== Performance report for TPCH SF2000 with Velox backend, for reference only ====

query	log/native_4456_time.csv	log/native_master_01_21_2024_c610efac5_time.csv	difference	percentage
q1	32.84	34.20	1.364	104.15%
q2	23.74	22.37	-1.368	94.24%
q3	36.44	38.12	1.678	104.60%
q4	37.48	37.47	-0.001	100.00%
q5	68.20	68.25	0.053	100.08%
q6	7.08	7.03	-0.047	99.33%
q7	83.14	81.72	-1.420	98.29%
q8	84.23	85.34	1.106	101.31%
q9	121.31	125.85	4.534	103.74%
q10	41.84	41.56	-0.277	99.34%
q11	20.40	20.02	-0.378	98.15%
q12	26.97	28.73	1.768	106.55%
q13	45.14	45.07	-0.073	99.84%
q14	19.03	18.94	-0.088	99.54%
q15	26.78	28.33	1.551	105.79%
q16	15.09	14.16	-0.931	93.83%
q17	100.76	98.38	-2.381	97.64%
q18	144.83	146.62	1.790	101.24%
q19	12.53	12.43	-0.093	99.25%
q20	26.58	25.25	-1.335	94.98%
q21	224.36	223.74	-0.619	99.72%
q22	13.79	13.60	-0.188	98.64%
total	1212.57	1217.21	4.644	100.38%