chore(deps): update dependency providers/flagd/test-harness to v3

[renovate]

This PR contains the following updates:

Package	Update	Change
providers/flagd/test-harness	major	v2.13.0 → v3.0.1

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Release Notes

open-feature/test-harness (providers/flagd/test-harness)

v3.0.1

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🐛 Bug Fixes

• update base, fix permissions issue (#​335) (fc91669)

v3.0.0

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⚠ BREAKING CHANGES

• make default variant optional (#​333)

✨ New Features

• make default variant optional (#​333) (f0a1dde)

v2.15.9

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🐛 Bug Fixes

• make file update atomic, wait for /start (#​329) (64011fa)

v2.15.8

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🐛 Bug Fixes

• race condition in /stop (#​327) (8bafdaf)

v2.15.7

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🐛 Bug Fixes

• correct default retryBackoffMaxMs value (7408867)

v2.15.6

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🐛 Bug Fixes

• more possible change deadlocks (#​324) (e103d93)

v2.15.5

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🐛 Bug Fixes

• revert ends_with non-string change (14eb032)

v2.15.4

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🐛 Bug Fixes

• deadlock if /change is called during /restart (#​321) (4583da2)

v2.15.3

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🐛 Bug Fixes

• Refactor in-process sync port scenarios (#​318) (1f6845c)

v2.15.2

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🐛 Bug Fixes

• Add fatalStatusCodes tags in config gherkin (#​316) (49764f6)

v2.15.1

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🐛 Bug Fixes

• Add @​sync-port tag to in-process scenarios (#​314) (3af557a)

v2.15.0

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🐛 Bug Fixes

• remove file mode from forbidden flagd connection test (#​312) (1759a94)

✨ New Features

• Add FLAGD_BASE_IMAGE build argument to Dockerfile (#​308) (779adad)
• Add FLAGD_SYNC_PORT support for in-process providers with backwards compatibility (#​310) (513f2a9)
• add missing steps for config and improve wording (#​311) (c1f632b)
• Support multi-platform build (#​313) (e1ff79c)

v2.14.0

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✨ New Features

• improve forbidden with options (#​304) (00b7cfb)

v2.13.1

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🧹 Chore

• add test to ensure fatal state on forbidden error (#​756) (#​302) (446a9f5)

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