feat: remove support in-body parameter in arazzo

[DmitryAnansky]

What/Why/How?

Removed support for in: body parameters due to Arazzo specification updates.

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

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

[changeset-bot]

🦋 Changeset detected

Latest commit: 778cbac

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]

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
redocly lint packages/core/src/benchmark/benches/rebilly.yaml	972.4 ± 11.1	961.2	992.4	1.00
redocly-next lint packages/core/src/benchmark/benches/rebilly.yaml	976.9 ± 11.7	962.4	999.7	1.00 ± 0.02

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	78.63%	5047/6419
🟡	Branches	67.28%	2056/3056
🟡	Functions	73.13%	833/1139
🟡	Lines	78.92%	4761/6033

Test suite run success

835 tests passing in 120 suites.

Report generated by 🧪jest coverage report action from 778cbac