fix(ec2-metadata-service): set timeout for requests

[siddsriv]

Issue

#6042

Description

set the timeout for requests to ec2-mds.

Testing

E2E tests for the package pass.

 PASS  src/MetadataService.e2e.spec.ts
  MetadataService E2E Tests
    ✓ should fetch metadata token successfully (6 ms)
    ✓ should fetch metadata successfully with token (4 ms)
    ✓ should fetch metadata successfully (without token -- disableFetchToken set to true) (2 ms)
    ✓ should handle TimeoutError by falling back to IMDSv1 (3 ms)
    ✓ should handle specific error codes by falling back to IMDSv1 (6 ms)
    ✓ should timeout as expected when a request exceeds the specified duration (4 ms)

Test Suites: 1 passed, 1 total
Tests:       6 passed, 6 total
Snapshots:   0 total
Time:        3.358 s, estimated 4 s
Ran all test suites.
Done in 4.34s.

Checklist

• If you wrote E2E tests, are they resilient to concurrent I/O?

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