ci: build static x64 cli binary

[huancheng-trili]

Context

Completes JSTZ-345.
JSTZ-345

Description

Build CLI for x86_64-unknown-linux-musl in order to get static x64 cli binaries.

I tried to use pkgsMusl in nix, but nix tried to rebuild a whole bunch of irrelevant packages for musl, which took hours, and in the end there were some error in those in irrelevant packages, and again mozjs does not have a prebuilt for x86_64-unknown-linux-musl, so I'm building this as how it's done for aarch64-linux.

Manually testing the PR

Test workflow run

Also tested the built binary in a clean x64 environment.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 46.67%. Comparing base (c208e95) to head (4612fd0).
Report is 7 commits behind head on main.

see 15 files with indirect coverage changes

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[zcabter]

LGTM