Co-authored-by: Hweinstock <[email protected]>

ci(lint): rule to detect index.ts imports in core

…lemetry (#6521)

## Problem
We are mistakenly counting several client-side failures as service
faults, which is affecting our availability metrics.

## Solution
Exclude frequent client errors from faults, they should be errors.

there are multiple layers of errors, some of those are categorized to
toolkit level errors, for example this part:
```
case MonthlyConversationLimitError.name:
case CodeIterationLimitError.name:
case PromptRefusalException.name:
case NoChangeRequiredException.name:
```
Others are defaulting to ToolkitError with messages.

Ideally we should add more error models to toolkit, but for now to make
a quick fix, I just looked into the error msg, similar to what we do
here:
https://github.com/aws/aws-toolkit-vscode/blob/02d21a2fafc7479fb398ea078aa3e3adf7c62e7a/packages/core/src/amazonqFeatureDev/client/featureDev.ts#L198



---

- Treat all work as PUBLIC. Private `feature/x` branches will not be
squash-merged at release time.
- Your code changes must meet the guidelines in
[CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).
- License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.

---------

Co-authored-by: Yuxin Lin <[email protected]>

)

## Problem
- If user tries to run `/test` on the test file, Q considers test file
as source file and starts the test generation on the test file.

## Solution
- If user tries to run `/test` on the test file, Q infers the context
from the original source file and generate tests accordingly.
- No change in functionality, minor change in UX filename.

---

- Treat all work as PUBLIC. Private `feature/x` branches will not be
squash-merged at release time.
- Your code changes must meet the guidelines in
[CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).
- License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.