Test against TruffleRuby

[vinistock]

Motivation

We should make sure the Ruby LSP also works with TruffleRuby.

[vinistock]

JRuby

JRuby is failing on a test and it seems like a bug (maybe in JRuby's Ripper implementation?). In MRI, SyntaxTree::Parser#on_params receives optionals as an array of SyntaxTree::Ident, but in JRuby we receive an array of SyntaxTree::VarRef.

TruffleRuby

The integration tests seem to be hanging. Still investigating why.

[github-actions]

Benchmark results in seconds (slowest at top)

          textDocument/completion average: 0.262625 std_dev: 0.004946
          textDocument/diagnostic average: 0.038287 std_dev: 0.009206
      textDocument/selectionRange average: 0.003209 std_dev: 0.000396
   textDocument/documentHighlight average: 0.001649 std_dev: 9.1e-05
      textDocument/documentSymbol average: 0.001643 std_dev: 9.2e-05
 textDocument/semanticTokens/full average: 0.00164 std_dev: 0.000265
            textDocument/codeLens average: 0.001635 std_dev: 0.000115
        textDocument/documentLink average: 0.001634 std_dev: 9.9e-05
        textDocument/foldingRange average: 0.001446 std_dev: 8.5e-05
textDocument/semanticTokens/range average: 0.000824 std_dev: 4.5e-05
           textDocument/inlayHint average: 0.00058 std_dev: 2.9e-05
               codeAction/resolve average: 0.00056 std_dev: 6.2e-05
               textDocument/hover average: 0.000523 std_dev: 5.5e-05
          textDocument/formatting average: 6.0e-05 std_dev: 0.00029
    textDocument/onTypeFormatting average: 5.9e-05 std_dev: 4.1e-05
          textDocument/codeAction average: 3.4e-05 std_dev: 2.7e-05


================================================================================
Comparison with main branch:

 textDocument/semanticTokens/full unchanged
textDocument/semanticTokens/range unchanged
      textDocument/documentSymbol unchanged
        textDocument/foldingRange unchanged
          textDocument/formatting unchanged
          textDocument/diagnostic unchanged
        textDocument/documentLink unchanged
           textDocument/inlayHint unchanged
      textDocument/selectionRange unchanged
   textDocument/documentHighlight unchanged
               textDocument/hover unchanged
          textDocument/codeAction unchanged
    textDocument/onTypeFormatting unchanged
               codeAction/resolve unchanged
          textDocument/completion unchanged
            textDocument/codeLens unchanged

[github-actions]

This pull request is being marked as stale because there was no activity in the last 2 months

[vinistock]

Closing this for now. We'll need to do another attempt to get TruffleRuby and JRuby in our CI.