bun:test: don't abort when formatting a test.each title value throws - #36911

The same `write!`-into-infallible-sink panic this PR fixes remains at two sibling sites: `src/runtime/test_runner/expect.rs:2801` (`ExpectMatcherUtils::print_value`, reachable via `this.utils.printReceived/printExpected/stringify` in custom matchers — same crate, already returns `JsResult`, one-line swap to `write_to`) and `src/runtime/api/BunObject.rs:723` (`bun_inspect`, where the `.is_err()` branch is dead code because `write_fmt` panics before returning). Per REVIEW.md's whole-class rule, ei

The second `test.each` (the `%p` case) is never reached: `format_label`'s error propagates via `?` out of the `#[bun_jsc::host_fn]` at `ScopeFunctions.rs:229/251`, throwing synchronously during module evaluation, so the first `$a.b` case aborts the file before the `%p` line runs. The single `toContain("boom from inspect.custom")` is satisfied by the `$path` case alone — reverting the `%p` fix at `jest.rs:792` back to `write!(...).unwrap()` would not break this test. Pass an array of two input st