Crash when CodeQL evaluator log summary is too large

[dbartol]

Reported by several internal users:

[2023-09-06 14:13:16] Evaluation of .../code/ql/java/ql/src/Security/CWE/CWE-022/TaintedPath.ql produced BQRS results.
Error running query: Cannot create a string longer than 0x1fffffe8 characters (codeQL.quickEvalContextEditor)
Error: Error running query: Cannot create a string longer than 0x1fffffe8 characters
    at Object.slice (node:buffer:599:37)
    at Buffer.toString (node:buffer:819:14)
    at readFileHandle (node:internal/fs/promises:427:36)
    at generateSummarySymbols (~/.vscode/extensions/github.vscode-codeql-1.8.10/out/extension.js:144496:19)
    at generateSummarySymbolsFile (~/.vscode/extensions/github.vscode-codeql-1.8.10/out/extension.js:144492:19)
    at generateEvalLogSummaries (~/.vscode/extensions/github.vscode-codeql-1.8.10/out/extension.js:144889:7)
    at LocalQueryRun.summarizeEvalLog (~/.vscode/extensions/github.vscode-codeql-1.8.10/out/extension.js:145690:26)
    at LocalQueryRun.complete (~/.vscode/extensions/github.vscode-codeql-1.8.10/out/extension.js:145668:26)
    at LocalQueries.compileAndRunQueryInternal (~/.vscode/extensions/github.vscode-codeql-1.8.10/out/extension.js:146085:9)
    at LocalQueries.compileAndRunQuery (~/.vscode/extensions/github.vscode-codeql-1.8.10/out/extension.js:146025:5)
    at withProgress.title (~/.vscode/extensions/github.vscode-codeql-1.8.10/out/extension.js:145904:9)

The suspicion is that the log summary is too large to load as a single string, so we need to stream it.

[aeisenberg]

When this happens, is this indicative of a malformed query? If so, rather than actually trying to stream the JSON parsing into the file, we can just pop up a warning and say we're not even going to try to write the evaluator log. Instead we can suggest that the user reformulates their query so the log is shorter.

[aschackmull]

When this happens, is this indicative of a malformed query?

No. Long-tailed recursions generate a lot of log output.