fix: add type tree for metadata-schema rule

[tatomyr]

What/Why/How?

Fixes failures on the metadata-schema rule.

Reference

Testing

Screenshots (optional)

Check yourself

• [ ] Code changed? - Tested with redoc/reference-docs/workflows (internal)
• [ ] All new/updated code is covered with tests
• [ ] New package installed? - Tested in different environments (browser/node)

Security

• [x] Security impact of change has been considered
• [x] Code follows company security practices and guidelines

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 705243c7551059703425c51c8e329bac25ecf4b2

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

| Name | Type | | --------------------- | ----- | | @redocly/openapi-core | Patch | | @redocly/cli | Patch |

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[github-actions[bot]]

Command	Mean [s]	Min [s]	Max [s]	Relative
redocly lint packages/core/src/benchmark/benches/rebilly.yaml	1.031 ± 0.016	1.013	1.062	1.00
redocly-next lint packages/core/src/benchmark/benches/rebilly.yaml	1.038 ± 0.014	1.026	1.076	1.01 ± 0.02

[github-actions[bot]]

Coverage report

St.:grey_question:	Category	Percentage	Covered / Total
🟡	Statements	76.65%	4395/5734
🟡	Branches	66.72%	2360/3537
🟡	Functions	70.1%	722/1030
🟡	Lines	76.82%	4126/5371

Test suite run success

716 tests passing in 101 suites.

Report generated by 🧪jest coverage report action from 705243c7551059703425c51c8e329bac25ecf4b2