fix: wrong discriminator mapping when bundling with derefernce

[tatomyr]

What/Why/How?

Fixed bundling with the --dereferenced option. Previously, references to external files were not substituted with references to components, causing them to become invalid.

For example, bundling this:

openapi: 3.1.0
info: {}
paths:
  /test:
    get:
      responses:
        default:
          content:
            application/json:
              schema:
                type: object
                discriminator:
                  propertyName: discriminatedProp
                  mapping:
                    Foo: ./foo.yaml
                    Bar: ./bar.yaml
                oneOf:
                  - $ref: ./foo.yaml
                  - $ref: ./bar.yaml

will lead to this (please notice the comments):

openapi: 3.1.0
info: {}
paths:
  /test:
    get:
      responses:
        default:
          content:
            application/json:
              schema:
                type: object
                discriminator:
                  propertyName: discriminatedProp
                  mapping:
                    Foo: ./foo.yaml # <-- THIS REFERENCE IS NO LONGERE VALID
                    Bar: ./bar.yaml # <-- THIS REFERENCE IS NO LONGERE VALID
                oneOf:
                  - type: object
                    properties: &ref_0
                      discriminatedProp:
                        type: string
                      foo:
                        type: string
                  - type: object
                    properties: &ref_1
                      discriminatedProp:
                        type: string
                      bar:
                        type: boolean
components:
  schemas:
    foo:
      type: object
      properties: *ref_0
    bar:
      type: object
      properties: *ref_1

Reference

#1602

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: ea2b460

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

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

Command	Mean [s]	Min [s]	Max [s]	Relative
redocly lint packages/core/src/benchmark/benches/rebilly.yaml	1.011 ± 0.020	0.986	1.062	1.00
redocly-next lint packages/core/src/benchmark/benches/rebilly.yaml	1.018 ± 0.026	0.977	1.061	1.01 ± 0.03

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	78.57%	4991/6352
🟡	Branches	67.24%	2061/3065
🟡	Functions	72.98%	824/1129
🟡	Lines	78.86%	4709/5971

Test suite run success

809 tests passing in 121 suites.

Report generated by 🧪jest coverage report action from ea2b460