[7.x] [APM] Removes the apm_oss plugin and deprecates related configs (#113364)#114873

Merged

ogupte merged 1 commit intoelastic:7.xfrom ogupte:backport/7.x/pr-113364

Oct 13, 2021

+850-1,256

Commits on Oct 13, 2021

[APM] Removes the apm_oss plugin and deprecates related configs (elastic#113364 )
ogupte
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