ci: add the ubuntu-24.04-arm as os for build-test

[ItshMoh]

Description

Resolves the issue bitcoindevkit/bdk_wallet#23

Notes to the reviewers

Here bitcoindevkit/bdk_wallet#23 we have to add ubuntu-24.04-arm as os for build-test.

Checklists

All Submissions:

• I've signed all my commits
• I followed the contribution guidelines
• I ran cargo fmt and cargo clippy before committing

[oleonardolima]

Thanks for working on this one! Please note that the CI is failing on the new ARM runner, and will require further investigation and debugging.

[notmandatory]

Looks like the electrsd crate may need to be updated to provide arm builds of electrs and bitcoind or this workflow will need to be updated to build its own local arm build for electrsd and bitcoind.