Pre-format licenses script (flutter#57219)

The license script has load-baring formatting: Changing its format makes signature checks fail. To ensure the formatting change goes in smoothly later this week I am taking it off the critical path by pre-formatting it. The script itself is fairly stable, so I am not expecting any changes to it between now and when we actually enforce formatting. Edit: The issue that surfaced with `ci/licenses_golden/licenses_dart` is another reason to take this off the critical path of enforcing formatting.

Author: goderbauer

ci/licenses_golden/tool_signature

@@ -1,2 +1,2 @@
-Signature: 08cd2e281007e92182d3d540ff50e0ad
+Signature: ddf9867e4034dc9bd94a9e107c31752e