fix(amazonq): do not overwrite failure reason, use lowercase lang name

[dhasani23]

Problem

Our backend is expecting the language name (java or sql) to be lowercase, not uppercase. Also, the failure reason returned by one of our APIs was being overwritten and not shown to users.

Solution

User lowercase, and prevent overwriting.

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License: I confirm that my contribution is made under the terms of the Apache 2.0 license.

[github-actions]

• This pull request modifies code in src/* but no tests were added/updated.
  • Confirm whether tests should be added or ensure the PR description explains why tests are not required.
• This pull request implements a feat or fix, so it must include a changelog entry (unless the fix is for an unreleased feature). Review the changelog guidelines.
  • Note: beta or "experiment" features that have active users should announce fixes in the changelog.
  • If this is not a feature or fix, use an appropriate type from the title guidelines. For example, telemetry-only changes should use the telemetry type.

[dhasani23]

Note: I may add a feature flag around this SQL Conversions feature in this PR too, will let you know by the early afternoon of Wednesday 11/20, if so I should also remove the CHANGELOG entry.

[jpinkney-aws]

Also, the failure reason returned by one of our APIs was being overwritten and not shown to users.

Is that something that would be useful to have a changelog item for?

[nkomonen-amazon]

If there is potential that these values will be used in other telemetry events this may be worth putting in to a function

[dhasani23]

Yeah, post-re:Invent planning on adding a separate utils file for these kinds of things