chore: remove baseapp and sdk.Context fully from x/upgrade

[aljo242]

Description

Closes: #XXXX

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Summary by CodeRabbit

• New Features

  • Introduced an enhanced branch service mock to improve backend testing simulations.

• Tests

  • Streamlined test setups with improved context handling and enhanced transaction encoding/decoding for more reliable integration.

• Chores

  • Upgraded dependency versions and simplified configuration directives across multiple modules for improved stability and maintainability.