[CORE] Fix wrong fallback cost

[ulysses-you]

What changes were proposed in this pull request?

Since we have removed AQE columnar shuffle read, so it's possible the gluten plan and query stage are not adjacent. This pr changes to collect leaves for gluten plan to make code robust.

How was this patch tested?

add test

[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

[ulysses-you]

cc @PHILO-HE thank you

[PHILO-HE]

Looks good! Thanks!
We are fixing CI issue. Stay tuned.

[GlutenPerfBot]

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

query	log/native_3967_time.csv	log/native_master_12_06_2023_d6b1e9138_time.csv	difference	percentage
q1	33.65	33.13	-0.519	98.46%
q2	24.61	25.88	1.273	105.17%
q3	38.50	36.12	-2.382	93.81%
q4	36.88	38.73	1.848	105.01%
q5	71.68	72.19	0.507	100.71%
q6	5.50	7.01	1.510	127.43%
q7	85.84	84.85	-0.991	98.85%
q8	86.79	87.08	0.284	100.33%
q9	123.73	127.07	3.344	102.70%
q10	44.76	44.57	-0.190	99.57%
q11	20.51	20.26	-0.251	98.78%
q12	24.97	21.15	-3.827	84.68%
q13	46.70	48.39	1.694	103.63%
q14	16.06	18.86	2.800	117.44%
q15	28.81	27.18	-1.622	94.37%
q16	15.64	15.92	0.280	101.79%
q17	102.62	102.54	-0.086	99.92%
q18	151.42	152.02	0.607	100.40%
q19	12.94	13.90	0.957	107.39%
q20	28.69	27.91	-0.782	97.27%
q21	223.35	223.84	0.482	100.22%
q22	13.15	13.24	0.090	100.68%
total	1236.81	1241.84	5.027	100.41%