Add server config to filter out syntax error diagnostics

[dhruvmanila]

Summary

Follow-up from #11901

This PR adds a new server setting to show / hide syntax errors.

Test Plan

VS Code

Using astral-sh/ruff-vscode#504 with the following config:

{
  "ruff.nativeServer": true,
  "ruff.path": ["/Users/dhruv/work/astral/ruff/target/debug/ruff"],
  "ruff.showSyntaxErrors": true
}

First, set ruff.showSyntaxErrors to true:

And then set it to false:

Neovim

Using the following Ruff server config:

require('lspconfig').ruff.setup {
  init_options = {
    settings = {
      showSyntaxErrors = false,
    },
  },
}

First, set showSyntaxErrors to true:

And then set it to false:

[MichaReiser]

It's so much easier to think about backward compatibility with the new LSP where it isn't a combination of VS code extension version, LSP and ruff versions.

[dhruvmanila]

This seemed like a quick win to avoid cloning Url via make_key for every diagnostics.

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

ℹ️ ecosystem check encountered linter errors. (no lint changes; 1 project error)

demisto/content (error)

ruff check --no-cache --exit-zero --ignore RUF9 --output-format concise --preview

warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `pyproject.toml`:
  - 'ignore' -> 'lint.ignore'
  - 'select' -> 'lint.select'
  - 'unfixable' -> 'lint.unfixable'
  - 'per-file-ignores' -> 'lint.per-file-ignores'
warning: `PGH001` has been remapped to `S307`.
warning: `PGH002` has been remapped to `G010`.
warning: `PLR1701` has been remapped to `SIM101`.
ruff failed
  Cause: Selection of deprecated rule `E999` is not allowed when preview is enabled.