feat: use invoke-store from global

[maxday]

Description of changes:

Previously, we introduced a breaking change in aws/lambda-invoke-store to allow lazy loading a costly dependency (see awslabs/aws-lambda-invoke-store#13)
Now, it requires the store to be retrieved using an await operation. This change would force our callers to become async, leading to extensive refactoring and breaking changes in public-facing functions.

To maintain backward compatibility, we've updated the implementation to use globalThis.awslambda?.InvokeStore instead. This approach avoids the need for async operations while still accessing the store.

Test cases have been updated accordingly.

Some minor linting fix in the test file

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.31%. Comparing base (bd760ba) to head (b272b37).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #732   +/-   ##
=======================================
  Coverage   84.31%   84.31%           
=======================================
  Files          36       36           
  Lines        1817     1817           
=======================================
  Hits         1532     1532           
  Misses        285      285           

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