HPCC-10878 Remove ECL tab from WUDetailsWidget

No need for ECL + Playground

Fixes HPCC-10878

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #5492 from GordonSmith/HPCC-10878

HPCC-10878 Remove ECL tab from WUDetailsWidget

Reviewed-By: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>