feat(MI-353): update link shortener API endpoints

[amaan-lob]

Fixes #<INSERT ISSUE NUMBER HERE>

Checklist

• Up to date with main
• All the tests are passing
  • Delete all resources created in tests
• Prettier
• Spectral Lint
• npm run bundle outputs nothing suspect
• npm run postman outputs nothing suspect

Changes

Removing bulk actions from docs and updating request/response payloads for the remaining link shortener APIs

Areas of Concern (optional)

[juanfriss]

I think you need to update https://github.com/lob/lob-openapi/blob/main/package.json#L3 too!

[guardrails]

⚠️ We detected 10 security issues in this pull request:

Vulnerable Libraries (10)

Severity	Details
High	pkg:npm/@stoplight/[email protected] (t) upgrade to: > 4.14.1
High	pkg:npm/[email protected] (t) upgrade to: > 4.15.2
High	pkg:npm/[email protected] (t) upgrade to: > 4.3.3
High	pkg:npm/@redocly/[email protected] (t) upgrade to: > 1.12.2
High	pkg:npm/[email protected] (t) upgrade to: > 3.2.1
High	pkg:npm/[email protected] (t) upgrade to: > 0.13.21
High	pkg:npm/[email protected] (t) upgrade to: > 1.77.2
High	pkg:npm/[email protected] (t) upgrade to: > 6.5.1
High	pkg:npm/[email protected] (t) upgrade to: > 4.2.2
High	pkg:npm/@stoplight/[email protected] (t) upgrade to: > 6.11.1

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