feat(ingestion/grafana) add option to pass grafana user email as dashboard owner

[daha]

This MR add a option like for the powerbi source to use the user email for the corpuser URN or just the part before @. Default to the part before @ as that is the behavior before this change.

Also so not add the unique dashboard id as a dashboard owner. I really do not understand why that was added in the first place. If someone really need it, it can be added by a transformer as the dashboard id is part of the dashboard URN.

yaml
*Example Grafana recipe configuration*

source:
  type: grafana
  config:
    url: "https://your-grafana.com/"
    
    # Example 1: Default behavior (strip emails to usernames)
    # This creates: urn:li:corpuser:john
    remove_email_suffix: true  # or omit (this is default)
    
    # Example 2: Keep full email as corporate user identifier
    # This creates: urn:li:corpuser:[email protected]
    # Use this if your company's SSO/LDAP uses full emails as user IDs
    remove_email_suffix: false

• The PR conforms to DataHub's Contributing Guideline (particularly PR Title Format)
• Tests for the changes have been added/updated (if applicable)
• Docs related to the changes have been added/updated (if applicable). If a new feature has been added a Usage Guide has been added for the same.

[deepgarg760]

@daha , Good work!!
Please add documentation regarding change in the owner type

[daha]

@daha , Good work!! Please add documentation regarding change in the owner type

Where should that information be added, @deepgarg760?

[daha]

I have renamed the configuration option, used the one used in powerbi source instead, which I think has a better name. I have updated the docs for the source a bit. @deepgarg760

[codecov]

Bundle Report

Changes will decrease total bundle size by 23.61kB (-0.08%) ⬇️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
datahub-react-web-esm	28.74MB	-23.61kB (-0.08%) ⬇️

Affected Assets, Files, and Routes:

view changes for bundle: datahub-react-web-esm

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
assets/index-*.js	-23.61kB	19.11MB	-0.12%

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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