Support ADC fetching for HTTP tool #1030

Prerequisites

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What are you trying to do that currently feels hard or impossible?

When querying Google APIs that require OAuth access token from ADC credentials, users need to set a headerParam and query using Toolbox SDK's dynamic bound parameter:

    source: my-http-source
    method: GET
    path: /search
    description: some description
    headerParams:
      - name:  Authorization
        description: Google OAuth access token
        type: string

Suggested Solution(s)

Instead, we can create a new HTTP tool field sendGoogleAccessToken that automatically fetches ADC and send it out in the header, making it a much easier user experience.

    source: my-http-source
    method: GET
    path: /search
    description: some description
    sendGoogleAccessToken

Alternatives Considered

No response

Additional Details

Related issue: #1025