chore: exclude argocd-server rbac for core-install

[chetan-rns]

Signed-off-by: Chetan Banavikalmutt chetanrns1997@gmail.com

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Core installation doesn't rely on argocd-server. This PR removes the unused argocd-server RBAC from the core install manifest

Closes: #7760

[codecov]

Codecov Report

Merging #8234 (d2638d4) into master (6962fc2) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #8234   +/-   ##
=======================================
  Coverage   41.63%   41.63%           
=======================================
  Files         174      174           
  Lines       22731    22731           
=======================================
  Hits         9464     9464           
  Misses      11910    11910           
  Partials     1357     1357           

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[alexmt]

Thank you @chetan-rns ! LGTM