OpenAPI doesn't show ZetaChain endpoints, only Cosmos SDK ones

[fadeev]

For some reason a | character is being added, which breaks the OpenAPI browser.

  /zeta-chain/crosschain/TSS: |
    get:
        summary: Queries a tSS by index.
        operationId: Query_TSS
        responses:
            "200":
                description: A successful response.
                schema:
                    $ref: '#/definitions/crosschainQueryGetTSSResponse'
            default:
                description: An unexpected error response.
                schema:
                    $ref: '#/definitions/googlerpcStatus'
        tags:
            - Query

And here's a Cosmos SDK endpoint for comparison:

  /cosmos/auth/v1beta1/accounts/{address}:
    get:
      summary: Account returns account details based on address.
      operationId: Account
      responses:
        '200':
          description: A successful response.
          schema:
            type: object
            properties:

This has changed recently, because it used to show all endpoints just fine.

[fadeev]

The problem is here:

https://github.com/zeta-chain/node/blob/60edc0e8b43ef44a014721740586b4345aa485c7/scripts/protoc-gen-openapi.sh#L3

We're using the latest version, and apparently one of the version changed how the spec is generated.

[fadeev]

Source of the issue: grpc-ecosystem/grpc-gateway#3557