Bare metal greentea tests compilation fixes

[evedon]

Description

Summary of change

Two recent PRs introduced compilation errors when building greentea tests with bare metal profile:

• Enable FAT ChaN lib configuration with mbed_lib.json #11851 We need to include fat_chan to build bare metal greentea tests due to this PR.
• Fix watchdog reset test #11773 We need to excluse watchdog reset test cases because they now rely on a thread running in the background.

Documentation

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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)

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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

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These errors were found because we are introducing nightly CI for bare metal greentea tests.

Reviewers

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@SeppoTakalo @fkjagodzinski

Release Notes

Summary of changes

Impact of changes

Migration actions required

[0xc0170]

#11851 We need to include fat_chan to build bare metal greentea tests due to this PR.

That PR just added configuration file for a library, no other changes . Did it break baremetal?

[jamesbeyond]

Look good

[evedon]

#11851 We need to include fat_chan to build bare metal greentea tests due to this PR.

That PR just added configuration file for a library, no other changes . Did it break baremetal?

Yes, same failures as described here: #11851 (comment)

[mbed-ci]

Test run: SUCCESS

Summary: 5 of 5 test jobs passed
Build number : 1
Build artifacts