CPLAT-9182: Add --reporter option to TestTool

[evanweible-wf]

The --reporter option is a commonly used option when running tests. This PR adds it to TestTool so that it can be used directly with ddev test instead of having to use --test-args to configure it.

# before
$ ddev test --test-args="--reporter expanded"
# now
$ ddev test --reporter expanded

Note: the -r abbreviation was intentionally not added because it conflicts with the abbreviation for the --release flag used when running tests via build_runner. In other words, when running tests via ddev test, the -r abbreviation has no meaning and the full option name (either --release or --reporter) should be used to avoid ambiguity.

[aviary3-wk]

Security Insights

No security relevant content was detected by automated scans.

Action Items

• Review PR for security impact; comment "security review required" if needed or unsure
• Verify aviary.yaml coverage of security relevant code

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[todbachman-wf]

QA +1. Works as expected, both with and without the --reporter option.

[evanweible-wf]

@Workiva/release-management-p

[rmconsole-wf]

+1 from RM