Feature/change opportunity tags

[Sugandhgyl]

Please ensure your pull request adheres to the following guidelines:
WHAT CHANGED

Added a new mapping in constants.js that defines specific tags for each opportunity type (mentioned here) and modified the opportunities controller to automatically append these tags along with default tags ('automated', 'spacecat') when creating or updating opportunities.

• make sure to link the related issues in this description. Or if there's no issue created, make sure you
  describe here the problem you're solving.
• when merging / squashing, make sure the fixed issue references are visible in the commits, for easy compilation of release notes

If the PR is changing the API specification:

• make sure you add a "Not implemented yet" note the endpoint description, if the implementation is not ready
  yet. Ideally, return a 501 status code with a message explaining the feature is not implemented yet.
• make sure you add at least one example of the request and response.

If the PR is changing the API implementation or an entity exposed through the API:

• make sure you update the API specification and the examples to reflect the changes.

If the PR is introducing a new audit type:

• make sure you update the API specification with the type, schema of the audit result and an example

Related Issues

Thanks for contributing!

[github-actions]

This PR will trigger a minor release when merged.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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