refactor: migrate firehose to component tests

[ItsSudip]

Description of the change

Resolves INT-560
Migrating testcases of FIREHOSE to new format

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Related issues

Fix #1

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests
• All tests related to the changed code pass in development

Code review

• This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• "Ready for review" label attached to the PR and reviewers mentioned in a comment
• Changes have been reviewed by at least one other engineer
• Issue from task tracker has a link to this pull request

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (3ff86d4) 86.59% compared to head (471cfa7) 86.60%.

Additional details and impacted files

@@                            Coverage Diff                             @@
##           refactor.migrate-test-cases-to-new-format    #2587   +/-   ##
==========================================================================
  Coverage                                      86.59%   86.60%           
==========================================================================
  Files                                            563      562    -1     
  Lines                                          27796    27771   -25     
  Branches                                        6656     6648    -8     
==========================================================================
- Hits                                           24071    24051   -20     
+ Misses                                          3369     3365    -4     
+ Partials                                         356      355    -1     

Files Changed	Coverage Δ
...tegrations/destinations/firehose/processor/data.ts	100.00% <100.00%> (ø)

... and 11 files with indirect coverage changes

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[sonarqubecloud]

SonarCloud Quality Gate failed.   

1 Bug
0 Vulnerabilities
0 Security Hotspots
22 Code Smells

74.4% Coverage
10.6% Duplication

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