Functional Tests for SnippetsFilter

[salonichf5]

Proposed changes

Write a clear and concise description that helps reviewers understand the purpose and impact of your changes. Use the
following format:

Problem: User wants to have functional tests for SnippetsFilter.

Solution: Adds functional tests for SnippetsFilter

Test Case Scenarios

1. Tests SnippetsFilter are correctly applied to HTTPRoute

• Verify SnippetsFilter Status is Accepted
• Verify traffic is working for the uri configured.
• Verify directives are placed in the right context

2. Tests SnippetsFilter are correctly applied to GRPCRoute

• Verify SnippetsFilter Status is Accepted
• Verify traffic is working for the uri configured.
• Verify directives are placed in the right context

3. Tests invalid SnippetsFilter attached to routes throws an error

• When SnippetsFilter has directives which already exists in the nginx.conf.
• When SnippetsFilter has directives in the wrong context.

Testing: Run tests manually multiple times.

Please focus on (optional): If you any specific areas where you would like reviewers to focus their attention or provide
specific feedback, add them here.

Closes #2371

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

Release notes

If this PR introduces a change that affects users and needs to be mentioned in the release notes,
please add a brief note that summarizes the change.

[salonichf5]

pre-commit.ci autofix

[bjee19]

lgtm once lint checks are fixed and include directive checks are added to the http and main files

[salonichf5]

pre-commit.ci autofix