Moving this helper CMake file to the centralized Meta/CMake folder helps
to get a better grasp on what extra files are required for the build,
and what files are generated.
While we're at it, don't use add_compile_definitions for
ENABLE_UNICODE_DATA, which only needs to be seen by LibUnicode sources.
We need test-js for the parser tests for test262, but we don't need to
rebuild all of Lagom twice. This was missed when we did the initial
change to shared libraries. Before #9017, the Lagom build for test-js
is what built libLagom.a for the libjs-test262-runner to link against.
Now that we are building libjs.so and its dependencies in the runner's
build directory, we should build test-js there as well.
Requires linusg/libjs-test262#32 in order to properly find the built
test-js.
We already cache these files to prevent re-downloading them in the other
CI workflows, so this just brings the test262 runner up to speed with
the rest of them.
After linusg/libjs-test262/pull/30 goes into libjs-test262, we'll need
to pass SERENITY_SOURCE_DIR manually to the job to prevent it from
trying to do its own shallow clone. Also, remove the now defunct static
library build from the test262 workflow.
This should speed it up quite a bit and give us more consistent
performance. (So this workflow could eventually be used for perf
regression testing as well)
