chore: clean up destinationInfo from refreshTokenParams

[ItsSudip]

Description

This PR refactors the OAuth v2 system by simplifying the RefreshTokenParams struct and removing the dependency on the full DestinationInfo object. Instead of passing the entire destination object, it now only passes the specific DestinationID string that's actually needed.

Key Changes:

1. Simplified RefreshTokenParams Structure (services/oauth/v2/types.go):

Removed: Destination *DestinationInfo field
Added: DestinationID string field
Improved: Field alignment and formatting for better readability

2. Updated Token Generation (router/batchrouter/asyncdestinationmanager/bing-ads/common/token.go):

• Eliminated the creation of a DestinationInfo object in GenerateTokenV2()
• Now directly passes DestinationID instead of creating and passing the entire destination object
• Reduced code complexity: Removed 5 lines of unnecessary object construction

3. Streamlined HTTP Transport (services/oauth/v2/http/transport.go):

• Updated OAuth transport to pass rts.destination.ID directly instead of the full destination object
• Maintains the same functionality while reducing object dependencies

4. Updated Logging (services/oauth/v2/oauth.go):

• Modified logging to use refTokenParams.DestinationID directly instead of accessing it through the destination object
• Maintains the same logging information with cleaner access pattern

5. Comprehensive Test Updates (services/oauth/v2/oauth_test.go):

• Updated all test cases (102 lines changed) to use the new DestinationID field
• Improved test parameter formatting for better readability
• All tests maintain the same coverage and functionality

Benefits:

• Reduced Memory Footprint: No longer passing entire DestinationInfo objects when only the ID is needed
• Cleaner API: More explicit about what data is actually required
• Better Separation of Concerns: RefreshTokenParams now only contains the minimal data needed for token operations
• Improved Maintainability: Fewer dependencies between components
• Consistent Formatting: Better code alignment and readability

Impact:

This is a non-breaking refactoring that maintains all existing functionality while improving the internal architecture. The change is purely structural and doesn't affect the external behavior of the OAuth system.

Linear Ticket

https://linear.app/rudderstack/issue/INT-3721/clean-up-destinationinfo-from-refreshtokenparams

Security

• The code changed/added as part of this pull request won't create any security issues with how the software is being used.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.88%. Comparing base (382ae22) to head (cf1815c).
Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5897      +/-   ##
==========================================
- Coverage   76.94%   76.88%   -0.07%     
==========================================
  Files         494      494              
  Lines       68240    68235       -5     
==========================================
- Hits        52508    52460      -48     
- Misses      12863    12906      +43     
  Partials     2869     2869              

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