Closes elastic#227733

## Summary

- Preserves unquoted spaces in Console URL query values instead of
treating them as request-line trailing text.
- Keeps inline `//` and `#` comment stripping for request URLs.
- Adds focused edge-case coverage for the helper and the full
`parseLine` request-line path.

## Root Cause

- `removeTrailingWhitespaces` stopped at the first unquoted space, so
`GET myindex/_search?q=type:organisation AND elastic` was truncated
before `AND elastic`.

## Fix

- Use the first `?` outside quotes as the query-string boundary.
- Preserve spaces inside query values unless the space starts a trailing
inline `//` or `#` comment.
- Preserve the existing leading-space behavior and ignore comment
markers inside quoted query values.

## Before
<img width="1494" height="1313" alt="image"
src="https://github.com/user-attachments/assets/5ff9ebfe-dc42-4904-a87d-976dbadc2823"
/>

## After
<img width="1482" height="1365" alt="image"
src="https://github.com/user-attachments/assets/cf4bb6b3-56cf-4a39-9932-5d69f2a3cb95"
/>

## Test Plan

- [x] `node scripts/jest
src/platform/plugins/shared/console/public/application/containers/editor/utils/tokens_utils.test.ts`
- [x] `node scripts/eslint
src/platform/plugins/shared/console/public/application/containers/editor/utils/tokens_utils.ts
src/platform/plugins/shared/console/public/application/containers/editor/utils/tokens_utils.test.ts`
- [x] `node scripts/type_check --project
src/platform/plugins/shared/console/tsconfig.json`
- [x] `node scripts/check_changes.ts`
- [x] Manually verified in Console that unquoted query spaces are
preserved, trailing `//` and `#` comments are stripped, comment markers
inside quoted query values are preserved, quoted `?` path text is not
treated as the query delimiter, and trailing non-query text is trimmed
before sending the request.

Assisted with Cursor using GPT-5.5

Co-authored-by: Cursor <cursoragent@cursor.com>
(cherry picked from commit 9d7d161)