refactor(agent): replace metadata.is_case_manager with metadata.variant #6836

Job	Run time
check-versions / check-version-availability	8s
test / detect-changed-packages	8s
commit-lint / Commit Lint	16s
lint / detect-changed-packages	6s
lint / Lint uipath	26s
lint / Lint uipath-core	6s
lint / Lint uipath-platform	6s
test / E2E (uipath-platform, memory)	6s
test / Test (uipath-core, 3.11, ubuntu-latest)	5s
test / Test (uipath-platform, 3.13, ubuntu-latest)	5s
test / Test (uipath-core, 3.11, windows-latest)	6s
test / Test (uipath-core, 3.13, ubuntu-latest)	6s
test / Test (uipath-core, 3.12, windows-latest)	6s
test / Test (uipath-core, 3.12, ubuntu-latest)	7s
test / Test (uipath-platform, 3.13, windows-latest)	4s
test / Test (uipath-core, 3.13, windows-latest)	6s
test / Test (uipath, 3.11, ubuntu-latest)	57s
test / Test (uipath-platform, 3.11, windows-latest)	4s
test / Test (uipath, 3.13, ubuntu-latest)	42s
test / Test (uipath, 3.11, windows-latest)	1m 34s
test / Test (uipath-platform, 3.11, ubuntu-latest)	6s
test / Test (uipath, 3.12, ubuntu-latest)	46s
test / Test (uipath, 3.13, windows-latest)	1m 28s
test / Test (uipath-platform, 3.12, windows-latest)	6s
test / Test (uipath, 3.12, windows-latest)	1m 16s
test / Test (uipath-platform, 3.12, ubuntu-latest)	5s
lint / Lint	2s
test / Test	4s
	9m 17s

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