feat: Use job for GHA CLI workflow name

[calvin-codecov]

Closes https://github.com/codecov/core-engineering/issues/32

Uses the job YAML name as the first level of fallback for name before currently used build_code from GHA. This will NOT use the name field for the job even if it is set by the user. This also does NOT have any info on the current matrix value. As a future option, we could possibly ask users to provide the matrix value through their YAML file with a with statement.

        with:
          matrix: ${{ toJSON(matrix) }}

• adds a new argument for fallback_fields to take multiple fields in a chain with precedence

[cursor]

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