ci: Add Ubuntu 24.04 ARM support for build-test job

[vkprogrammer-001]

Description

This PR adds Ubuntu 24.04 ARM as a target platform for the build-test job in our CI workflow. This change will help ensure our codebase works correctly on ARM architecture.

Changes

• Added ubuntu-24.04-arm to the matrix of operating systems in the build-test job
• Modified runs-on to use the matrix variable for OS selection
• Maintained existing test configurations (Rust versions and features)

Testing

The CI workflow will now run in parallel on both:

• Ubuntu latest (x86_64)
• Ubuntu 24.04 ARM

Each platform will test all combinations of:

• Rust versions (latest and MSRV 1.63.0)
• Feature combinations (no-std and all-features)

Benefits

• Ensures compatibility with ARM-based systems
• Expands test coverage to include ARM architecture
• Helps catch potential architecture-specific issues early

Issue: #23

[vkprogrammer-001]

Hey, @notmandatory can you please review this PR? Thank you!

[notmandatory]

Did you see the PR and discussion here: bitcoindevkit/bdk#1905

You may run into the same issue and help review that PR if you have any suggestions.

[coveralls]

Pull Request Test Coverage Report for Build 14604822386

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 86.525%

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Totals
Change from base Build 14270666930:	0.0%
Covered Lines:	7269
Relevant Lines:	8401

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💛 - Coveralls

[notmandatory]

Looks like this one also needs to be rebased on the master branch.

[vkprogrammer-001]

Did you see the PR and discussion here: bitcoindevkit/bdk#1905

You may run into the same issue and help review that PR if you have any suggestions.

I reviewed PR bitcoindevkit/bdk#1905 and found an issue with electrsd. In my PR #1922, I resolved this by excluding electrs-dependent tests on ARM runners instead of building ARM versions of electrs and bitcoind.

I specifically updated the workflow to:

• Exclude bdk_electrum, bdk_bitcoind_rpc, bdk_testenv, and bdk_esplora tests on ARM
• Modify example builds to remove electrum-dependent examples on ARM

This approach allowed the ARM CI to pass without altering the electrsd crate itself. It's a temporary solution to maintain progress while we work on a comprehensive fix for ARM-compatible electrsd.

Since we have separated bdk_wallet from bdk, no additional adjustments are needed in the bdk_wallet.

[vkprogrammer-001]

Looks like this one also needs to be rebased on the master branch.

Hello @notmandatory,

I've verified that this PR is already rebased on the latest master branch. Both branches point to the same commit (3e61d2a).

Is there something specific in the CI that needs attention? Happy to address any other issues.

[notmandatory]

Ah ok I see the issue, I'll need to rename the required checks to use "ubuntu-latest".

[notmandatory]

ACK 63e7f4c