node 20 does not yet support `execArgv` as test run option

[sjvans]

node 20 does not yet support execArgv → https://nodejs.org/docs/latest-v20.x/api/test.html#runoptions

but used here:

cds-test/bin/chest.js

Line 66 in b789803

execArgv: [ '--require', require.resolve('../lib/fixtures/node-test.js') ],

and we state node >= 20:

cds-test/package.json

Line 26 in b789803

"node": ">=20"