Fix #530, Default CI to bash to apply pipefail

[skliper]

Checklist (Please check before submitting)

• I reviewed the Contributing Guide.
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Describe the contribution

• Fix Unit test CI not failing when tests fail #530

Without the bash pipefail option return codes can get masked
missing failures. Specifically seen in the unit test reusable
workflow where ctest returns were masked. By forcing
the default shell as bash, GitHub applies the pipefail option.

Testing performed
CI

Also tested from cf with https://github.com/skliper/CF/runs/7543285379?check_suite_focus=true (pointing to this branch) to confirm the failed ctest causes the CI to fail.

Expected behavior changes
Any failure in a pipeline will fail the CI step

System(s) tested on
CI

Additional context
Originally seen in CF

Code contributions
The cFS repository is provided to bundle the cFS Framework. It is utilized for bundling submodules, continuous integration testing, and version management and does not contain any software. Code contributions should be directed to the appropriate submodule.

Contributor Info - All information REQUIRED for consideration of pull request
Jacob Hageman - NASA/GSFC