Add expectation for namespaced hover

[andyw8]

Motivation

To help ensure the current behaviour is preserved when migrating to YARP.

Implementation

New fixture and expectation.

Automated Tests

n/a

Manual Tests

n/a

[github-actions]

Benchmark results in seconds (slowest at top)

          textDocument/completion average: 0.201887 std_dev: 0.00347
          textDocument/diagnostic average: 0.042441 std_dev: 0.009766
          textDocument/definition average: 0.004852 std_dev: 0.002911
      textDocument/selectionRange average: 0.004254 std_dev: 0.000528
   textDocument/documentHighlight average: 0.002629 std_dev: 0.000209
 textDocument/semanticTokens/full average: 0.002554 std_dev: 0.000182
            textDocument/codeLens average: 0.002553 std_dev: 0.00021
        textDocument/documentLink average: 0.002545 std_dev: 0.000216
      textDocument/documentSymbol average: 0.002529 std_dev: 0.00022
        textDocument/foldingRange average: 0.002491 std_dev: 0.000246
textDocument/semanticTokens/range average: 0.001684 std_dev: 0.000173
               codeAction/resolve average: 0.001461 std_dev: 0.000103
           textDocument/inlayHint average: 0.001418 std_dev: 7.4e-05
               textDocument/hover average: 0.001403 std_dev: 9.7e-05
          textDocument/formatting average: 0.000873 std_dev: 0.000296
    textDocument/onTypeFormatting average: 0.000858 std_dev: 8.7e-05
          textDocument/codeAction average: 0.000827 std_dev: 0.000102


================================================================================
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
          textDocument/definition unchanged


================================================================================
Missing benchmarks:

RubyLsp::Requests::ShowSyntaxTree