Bare metal: Enabling the watchdog green tea test

[rajkan01]

Summary of changes

To include the watchdog, watchdog_reset green tea test for bare metal. Build and run the test will be possible after this PR is merged.

Impact of changes

Migration actions required

Documentation

---

Pull request type

[x] Patch update (Bug fix / Target update / Docs update / Test update / Refactor)
[] Feature update (New feature / Functionality change / New API)
[] Major update (Breaking change E.g. Return code change / API behaviour change)

---

Test results

[] No Tests required for this change (E.g docs only update)
[x] Covered by existing mbed-os tests (Greentea or Unittest)
[] Tests / results supplied as part of this PR

---

Reviewers

@evedon @jamesbeyond

---

[ciarmcom]

@rajkan01, thank you for your changes.
@jamesbeyond @evedon @ARMmbed/mbed-os-hal @ARMmbed/mbed-os-core @ARMmbed/mbed-os-test @ARMmbed/mbed-os-maintainers please review.

[mprse]

Shouldn't this one be closed when we got PR #12182?

As far as I understand this PR disables watchdog tests for bare metal profile and PR #12182 makes them bare metal ready.

[fkjagodzinski]

@mprse, correct, the #12182 removes the RTOS dependency from the watchdog tests so these can run with a bare-metal profile. This PR removes a NOT SUPPORTED error for bare-metal; without this patch the tests will be skipped. Actually, both patches could have been combined into one PR.

[rajkan01]

This PR changes can be merged with PR#12182, so closing this PR.