(fix): MotherDuck config should set SaaS mode at the end #679

Job	Run time
code-quality	1m 19s
Buena Vista functional test / python 3.9	9m 38s
Check if MotherDuck v0.10.x token exists	1s
build packages	15s
functional test / python 3.8	2m 38s
fsspec test / python 3.9	1m 2s
functional test / python 3.9	2m 34s
file-based functional test / python 3.8	3m 13s
plugins test / python 3.9	1m 2s
functional test / python 3.10	2m 41s
file-based functional test / python 3.9	3m 7s
functional test / python 3.11	2m 12s
file-based functional test / python 3.10	3m 3s
unit test / python 3.8	52s
unit test / python 3.9	59s
file-based functional test / python 3.11	2m 39s
unit test / python 3.10	57s
unit test / python 3.11	59s
verify packages / python 3.8 / ubuntu-latest	33s
verify packages / python 3.9 / ubuntu-latest	36s
verify packages / python 3.10 / ubuntu-latest	31s
verify packages / python 3.11 / ubuntu-latest	29s
verify packages / python 3.8 / macos-latest	1m 9s
verify packages / python 3.9 / macos-latest	31s
verify packages / python 3.10 / macos-latest	37s
verify packages / python 3.11 / macos-latest	29s
verify packages / python 3.8 / windows-latest	1m 54s
verify packages / python 3.9 / windows-latest	1m 47s
verify packages / python 3.10 / windows-latest	1m 55s
verify packages / python 3.11 / windows-latest	1m 45s
MotherDuck functional test / python 3.9	5m 32s
	56m 59s

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