chore: bump toolbox version to 1.18.10

[klung16]

Bumps the toolbox version to 1.18.10. This version of toolbox contains changes to automatically turn on feature flags, which is required for server versions 9.1+

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Note

Low Risk
Simple version bump and changelog update; risk is limited to any behavioral changes introduced by Toolbox 1.18.10 at runtime.

Overview
Updates the image/config to use SingleStoreDB Toolbox 1.18.10 (from 1.18.6) via config.json.

Adds a 0.2.78 changelog entry noting the toolbox version bump.

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