[ABO-216][Erdstall] Add the ability to modify parameters

[DidacSF]

Description

This PR addresses the issue raised in https://ajunanetwork.atlassian.net/browse/ABO-216, to do so it adds two extrinsics:

• set_administrator: Allows to set an account as the pallet's administrator
• set_parameters: Allows the pallet's administrator to change the requested parameters

Type of changes

• build: Changes that affect the build system or external dependencies (eg, Cargo, Docker)
• ci: Changes to CI configuration
• docs: Changes to documentation only
• feat: Changes to add a new feature
• fix: Changes to fix a bug
• refactor: Changes that do not alter functionality
• style: Changes to format the code
• test: Changes to add missing tests or correct existing tests

Checklist

• Tests for the changes have been added
• Necessary documentation is added (if appropriate)
• Formatted with cargo fmt --all
• Linted with cargo clippy --all-features --all-targets
• Tested with cargo test --workspace --all-features --all-targets

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (develop-erdstall@b4c3376). Click here to learn what that means.

Additional details and impacted files

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