config(amazonq): inline project context ab

[Will-ShaoHua]

Problem

update inline suggestion project context ab test config

CONTROL

• use bm25 opentabs context

TREATMENT_1

• use repomap + bm25 open tabs context

TREATMENT_2

• use bm25 global project context

Solution

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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.

[justinmk3]

This correlates with test failures now seen on master (note: there are 2 different test runs; the failure is in the first, near the top of the build logs; search for the string "passing" to find it):

• https://github.com/aws/aws-toolkit-vscode/actions/runs/11842327301/job/33000682150
• https://github.com/aws/aws-toolkit-vscode/actions/runs/11842216947/job/33000324695
• https://github.com/aws/aws-toolkit-vscode/actions/runs/11842216947/job/33000325796
• https://github.com/aws/aws-toolkit-vscode/actions/runs/11842216947/job/33000323199

  1) crossFileContextUtil
       fetchSupplementalContextForSrc
         for control group, should return opentabs context where there will be 3 chunks and each chunk should contains 50 lines:

      AssertionError [ERR_ASSERTION]: The expression evaluated to a falsy value:

  assert_1.default.ok(actual.supplementalContextItems.length === 3)

      + expected - actual

      -false
      +true
      
      at Context.<anonymous> (test/unit/codewhisperer/util/crossFileContextUtil.test.ts:51:20)