feat: removed the support of the x-inherit extension for Spot

[DmitryAnansky]

What/Why/How?

Removed the support of the x-inherit extension for Spot

Reference

https://github.com/Redocly/redocly/issues/11346

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: b9d9f15

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	990.7 ± 22.7	965.5	1034.4	1.01 ± 0.03
redocly-next lint packages/core/src/benchmark/benches/rebilly.yaml	984.7 ± 17.9	956.4	1016.2	1.00

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	78.56%	4993/6356
🟡	Branches	67.21%	2062/3068
🟡	Functions	72.98%	824/1129
🟡	Lines	78.85%	4711/5975

Test suite run success

809 tests passing in 121 suites.

Report generated by 🧪jest coverage report action from b9d9f15