`toJSON` should tolerate properties that are only sometimes available instead of throwing a fatal `Unrecognized named-value`

Describe the bug
Actions need to be able to access contexts and be run regardless of which event a user chooses to use the action.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://github.com/jsoref/community-events/actions/runs/3233269851

Annotations

8 errors

debugjsoref/community-events-action/a/b/c/d/action.yml (Line: 13, Col: 17):

debugjsoref/community-events-action/a/b/c/d/action.yml (Line: 14, Col: 20):
debugjsoref/community-events-action/a/b/c/d/action.yml (Line: 18, Col: 18):
debugjsoref/community-events-action/a/b/c/d/action.yml (Line: 13, Col: 17): Unrecognized named-value: 'jobs'. Located at position 8 within expression: toJSON(jobs || '')Show more
debugjsoref/community-events-action/a/b/c/d/action.yml (Line: 14, Col: 20): Unrecognized named-value: 'secrets'. Located at position 8 within expression: toJSON(secrets || '')Show more
debugjsoref/community-events-action/a/b/c/d/action.yml (Line: 18, Col: 18): Unrecognized named-value: 'needs'. Located at position 8 within expression: toJSON(needs || '')Show more
debugGitHub.DistributedTask.ObjectTemplating.TemplateValidationException: The template is not valid. jsoref/community-events-action/a/b/c/d/action.yml (Line: 13, Col: 17): Unrecognized named-value: 'jobs'. Located at position 8 within expression: toJSON(jobs || ''),jsoref/community-events-action/a/b/c/d/action.yml (Line: 14, Col: 20): Unrecognized named-value: 'secrets'. Located at position 8 within expression: toJSON(secrets || ''),jsoref/community-events-action/a/b/c/d/action.yml (Line: 18, Col: 18): Unrecognized named-value: 'needs'. Located at position 8 within expression: toJSON(needs || '') at GitHub.DistributedTask.ObjectTemplating.TemplateValidationErrors.Check() at GitHub.Runner.Worker.ActionManifestManager.ConvertRuns(IExecutionContext executionContext, TemplateContext templateContext, TemplateToken inputsToken, String fileRelativePath, MappingToken outputs) at GitHub.Runner.Worker.ActionManifestManager.Load(IExecutionContext executionContext, String manifestFile)Show more
debugFail to load jsoref/community-events-action/a/b/c/d/action.yml

Annotations
8 errors
debug
jsoref/community-events-action/a/b/c/d/action.yml (Line: 13, Col: 17):
debug
jsoref/community-events-action/a/b/c/d/action.yml (Line: 14, Col: 20):
debug
jsoref/community-events-action/a/b/c/d/action.yml (Line: 18, Col: 18):
debug
jsoref/community-events-action/a/b/c/d/action.yml (Line: 13, Col: 17): Unrecognized named-value: 'jobs'. Located at position 8 within expression: toJSON(jobs || '')
debug
jsoref/community-events-action/a/b/c/d/action.yml (Line: 14, Col: 20): Unrecognized named-value: 'secrets'. Located at position 8 within expression: toJSON(secrets || '')
debug
jsoref/community-events-action/a/b/c/d/action.yml (Line: 18, Col: 18): Unrecognized named-value: 'needs'. Located at position 8 within expression: toJSON(needs || '')
debug
GitHub.DistributedTask.ObjectTemplating.TemplateValidationException: The template is not valid. jsoref/community-events-action/a/b/c/d/action.yml (Line: 13, Col: 17): Unrecognized named-value: 'jobs'. Located at position 8 within expression: toJSON(jobs || ''),jsoref/community-events-action/a/b/c/d/action.yml (Line: 14, Col: 20): Unrecognized named-value: 'secrets'. Located at position 8 within expression: toJSON(secrets || ''),jsoref/community-events-action/a/b/c/d/action.yml (Line: 18, Col: 18): Unrecognized named-value: 'needs'. Located at position 8 within expression: toJSON(needs || '') at GitHub.DistributedTask.ObjectTemplating.TemplateValidationErrors.Check() at GitHub.Runner.Worker.ActionManifestManager.ConvertRuns(IExecutionContext executionContext, TemplateContext templateContext, TemplateToken inputsToken, String fileRelativePath, MappingToken outputs) at GitHub.Runner.Worker.ActionManifestManager.Load(IExecutionContext executionContext, String manifestFile)
debug
Fail to load jsoref/community-events-action/a/b/c/d/action.yml

Expected behavior
Offer a way to provide a fallback value, e.g. toJSON(x || '')

Runner Version and Platform

Version of your runner? 2.298.2

OS of the machine running the runner? Linux

What's not working?

Job Log Output

If applicable, include the relevant part of the job / step log output here. All sensitive information should already be masked out, but please double-check before pasting here.

Runner and Worker's Diagnostic Logs

If applicable, add relevant diagnostic log information. Logs are located in the runner's _diag folder. The runner logs are prefixed with Runner_ and the worker logs are prefixed with Worker_. Each job run correlates to a worker log. All sensitive information should already be masked out, but please double-check before pasting here.

name: Debug GHA
on:
  branch_protection_rule:
  check_run:
  check_suite:
  create:
  delete:
  deployment:
  deployment_status:
  discussion:
  discussion_comment:
  fork:
  gollum:
  issue_comment:
  issues:
  label:
  member:
  milestone:
  page_build:
  project:
  project_card:
  project_column:
  public:
  pull_request:
  pull_request_review:
  pull_request_review_comment:
  push:
  release:
  repository_dispatch:
  status:
  watch:
  workflow_dispatch:
  workflow_run:
    workflows: [Test]

jobs:
  debug:
    runs-on: ubuntu-latest
    steps:
    - name: set up
      run: |
          echo github.action: ${{github.action}};
          echo github.action_path: ${{github.action_path}};
          echo github.action_ref: ${{github.action_ref}};
          echo github.action_repository: ${{github.action_repository}};
          echo github.actor: ${{github.actor}};
          echo github.api_url: ${{github.api_url}};
          echo github.base_ref: ${{github.base_ref}};
          echo github.env: ${{github.env}};
          echo github.event: ${{github.event}};
          echo github.event_name: ${{github.event_name}};
          echo github.event_path: ${{github.event_path}};
          echo github.graphql_url: ${{github.graphql_url}};
          echo github.head_ref: ${{github.head_ref}};
          echo github.job: ${{github.job}};
          echo github.ref: ${{github.ref}};
          echo github.ref_name: ${{github.ref_name}};
          echo github.ref_protected: ${{github.ref_protected}};
          echo github.ref_type: ${{github.ref_type}};
          echo github.path: ${{github.path}};
          echo github.repository: ${{github.repository}};
          echo github.repository_owner: ${{github.repository_owner}};
          echo github.repositoryUrl: ${{github.repositoryUrl}};
          echo github.retention_days: ${{github.retention_days}};
          echo github.run_id: ${{github.run_id}};
          echo github.run_number: ${{github.run_number}};
          echo github.run_attempt: ${{github.run_attempt}};
          echo github.server_url: ${{github.server_url}};
          echo github.sha: ${{github.sha}};
          echo github.token: ${{github.token}};
          echo github.workflow: ${{github.workflow}};
          echo github.workspace: ${{github.workspace}};
          echo env:;
          env
    - name: debug
      uses: jsoref/community-events-action@a/b/c/d

name: 'Debug'
description: 'Debug'
runs:
  using: composite
  steps:
    - id: debug
      name: debug
      shell: bash
      env:
        x_env: ${{ toJSON(env || '') }}
        x_github: ${{ toJSON(github || '') }}
        x_job: ${{ toJSON(job || '') }}
        x_jobs: ${{ toJSON(jobs || '') }}
        x_secrets: ${{ toJSON(secrets || '') }}
        x_steps: ${{ toJSON(steps || '') }}
        x_runner: ${{ toJSON(runner || '') }}
        x_matrix: ${{ toJSON(matrix || '') }}
        x_needs: ${{ toJSON(needs || '') }}
        x_inputs: ${{ toJSON(inputs || '') }}
      run: |
        echo action-env
        env
        echo
        echo 'objects...'

        cat <<<'EOF'
        github:
        ${{ toJSON(github) }}"

        env:
        ${{ toJSON(env) }}"

        job:
        ${{ toJSON(job) }}"

        jobs:
        {{ toJSON(jobs) }}"

        steps:
        ${{ toJSON(steps) }}"

        runner:
        ${{ toJSON(runner) }}"

        secrets:
        {{ toJSON(secrets) }}"

        strategy:
        ${{ toJSON(strategy) }}"

        matrix:
        ${{ toJSON(matrix) }}"

        needs:
        {{ toJSON(needs) }}"

        inputs:
        ${{ toJSON(inputs) }}"
        EOF

Start by reproducing the failure using the linked workflow and action examples, then read the diagnostic log showing validation of toJSON(jobs || ''), toJSON(secrets || ''), and toJSON(needs || ''). Trace how unavailable contexts are resolved and validated. Done means optional contexts no longer cause a fatal Unrecognized named-value error and the reported action can load across the listed events.