Fixing an incorrect 500 error response.

[v-isyamauchi-gh]

Description

The change will fix two issues.

• An incorrect 500 error response when a request contains a mix of smart v1 and v2 scopes.
• An unnecessary routing of a request to the custom error endpoint.

Related issues

Addresses [issue #196788].
Bug 196788: FHIR incident 826328930: mixed SMART v1/v2 scopes return 500 instead of a handled auth error

Testing

Tested by manual testing and running the smart UTs.

FHIR Team Checklist

• Update the title of the PR to be succinct and less than 65 characters
• Add a milestone to the PR for the sprint that it is merged (i.e. add S47)
• Tag the PR with the type of update: Bug, Build, Dependencies, Enhancement, New-Feature or Documentation
• Tag the PR with Open source, Azure API for FHIR (CosmosDB or common code) or Azure Healthcare APIs (SQL or common code) to specify where this change is intended to be released.
• Tag the PR with Schema Version backward compatible or Schema Version backward incompatible or Schema Version unchanged if this adds or updates Sql script which is/is not backward compatible with the code.
• When changing or adding behavior, if your code modifies the system design or changes design assumptions, please create and include an ADR.
• CI is green before merge
• Review squash-merge requirements

Semver Change (docs)

Patch|Skip|Feature|Breaking (reason)

[Codecov Comments Bot (codecov-commenter)]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.17%. Comparing base (1c9df51) to head (5597397).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5732      +/-   ##
==========================================
+ Coverage   77.08%   77.17%   +0.08%     
==========================================
  Files        1011     1011              
  Lines       37262    37316      +54     
  Branches     5680     5683       +3     
==========================================
+ Hits        28724    28797      +73     
+ Misses       7167     7139      -28     
- Partials     1371     1380       +9     

see 19 files with indirect coverage changes

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