test(client-PropertyDDS): mocha standardization

[jason-ha]

Use common mocha configuration pattern.

• delete unused property-properties/src/test/mocha.opts
• replace .mocharc.json (incorrect settings) with .mocharc.cjs
• property-properties test setup .js module relocated away from src/test to test as build is not needed
• package.json script entries updated to reflect CJS/ESM specifics

Test cases now execute with common [CJS] prefix. Warnings about unmatched file patterns are gone:

Warning: Cannot find any files matching pattern "test/setup.js"
Warning: Cannot find any files matching pattern "test/**/*.spec.js"

Note that property-properties test source files use require (CommonJS) and require conversion to test ESM (which is also not properly converted to support ESM). (The production ESM build is a phony and it not used.)

Additionally suppress blame history for PropertyDDS whitespace formatting commit.

This further applies the changes started by #25503 and #25292 for client workspace.

[Copilot]

Pull request overview

Standardizes Mocha configuration in the PropertyDDS client packages to align with the repo-wide @fluid-internal/mocha-test-setup conventions, removing legacy mocha config files and updating test/build scripts accordingly.

Changes:

• Replaced per-package .mocharc.json / mocha.opts usage with .mocharc.cjs backed by @fluid-internal/mocha-test-setup/mocharc-common.
• Updated package.json scripts to split mocha execution by module system (CJS/ESM) and align with common FLUID_TEST_MODULE_SYSTEM behavior.
• Added a .git-blame-ignore-revs entry to suppress formatting-only blame noise for PropertyDDS.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
experimental/PropertyDDS/packages/property-properties/test/setup.cjs	Minor setup adjustment/comment around chai should() initialization.
experimental/PropertyDDS/packages/property-properties/src/test/mocha.opts	Deleted unused legacy mocha opts file.
experimental/PropertyDDS/packages/property-properties/package.json	Updated build/test scripts for common mocha config + CJS/ESM split.
experimental/PropertyDDS/packages/property-properties/.mocharc.json	Removed incorrect JSON mocha config.
experimental/PropertyDDS/packages/property-properties/.mocharc.cjs	Added shared mocha config wiring + requires test setup.
experimental/PropertyDDS/packages/property-common/package.json	Updated build/test scripts for common mocha config + CJS/ESM split.
experimental/PropertyDDS/packages/property-common/.mocharc.json	Removed incorrect JSON mocha config.
experimental/PropertyDDS/packages/property-common/.mocharc.cjs	Added shared mocha config wiring.
.git-blame-ignore-revs	Added ignore entry for a PropertyDDS formatting commit.

Comments suppressed due to low confidence (1)

experimental/PropertyDDS/packages/property-properties/test/setup.cjs:20

• The inline comment says the chai.should() assignment shouldn't be needed, but the code still assigns to a global should. Since the tests appear to rely on the side-effect of enabling .should rather than the should variable itself, consider changing this to just call chai.should() (no assignment) or removing the comment if the assignment is intentionally kept.