Batch building/compiling tests (#2558)

We have to many tests in to many packages now. On windows I get `The
commandline is too long`. Solving this by batching 50 tests at the time.

## Checklist

- [/] I have added
[tests](https://www.cursorless.org/docs/contributing/test-case-recorder/)
- [/] I have updated the
[docs](https://github.com/cursorless-dev/cursorless/tree/main/docs) and
[cheatsheet](https://github.com/cursorless-dev/cursorless/tree/main/cursorless-talon/src/cheatsheet)
- [/] I have not broken the cheatsheet

---------

Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>

Author: AndreasArvidsson

packages/test-harness/scripts/build-tests.sh

@@ -1,6 +1,4 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-TESTS="$(find .. -name '*.test.ts')"
-
-pnpm run build:base --outdir=dist --out-extension:.js=.cjs $TESTS
+find .. -name '*.test.ts' | xargs -n 50 pnpm run build:base --outdir=dist --out-extension:.js=.cjs