Set custom target duration for workspace owned endpoints

What does this MR do and why?

Related to #357672 (closed)

Assignee	json.meta.caller_id.keyword	Count	99.5th percentile of json.duration_s	99.8th percentile of json.duration_s	Done	Urgency
@peterhegman	Projects::LearnGitlabController#index	7,389	2.19472	4.81248	FALSE	low
@peterhegman	DELETE /api/:version/groups/:id	7,322	0.63161	0.99	FALSE	default
@peterhegman	DELETE /api/:version/projects/:id/badges/:badge_id	7,319	0.54671	0.89263	FALSE	default
@peterhegman	ProjectsController#toggle_star	7,151	0.91423	2.32033	FALSE	low
@peterhegman	AutocompleteController#projects	6,977	0.29585	0.43146	FALSE	medium
@peterhegman	PUT /api/:version/namespaces/:id	6,698	1.64041	2.42389	FALSE	low
@peterhegman	HEAD /api/:version/user	6,247	0.38569	0.71337	FALSE	medium
@peterhegman	POST /api/:version/projects/:id/unarchive	6,229	0.90405	1.42148	FALSE	default
@peterhegman	ProjectsController#transfer	5,868	32.28066	35.38824	FALSE	low
@peterhegman	PUT /api/:version/projects/:id/badges/:badge_id	5,379	1.54004	1.94394	FALSE	low
@peterhegman	GroupsController#projects	4,608	2.95869	5.47828	FALSE	low
@peterhegman	Explore::ProjectsController#topics	4,194	2.09986	3.78675	FALSE	low
@peterhegman	ProjectsController#archive	4,038	3.17028	4.60723	FALSE	low
@peterhegman	PUT /api/:version/user/preferences	3,859	0.19356	0.2828	FALSE	high
@peterhegman	Dashboard::ProjectsController#removed	3,624	1.92036	3.79999	FALSE	low
@peterhegman	GET /api/:version/users/:user_id/starred_projects	3,493	1.57088	2.15764	FALSE	low
@peterhegman	GroupsController#destroy	3,488	0.69026	1.28388	FALSE	low

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