[release-1.5] Override and escape component provided by controller.

[knative-prow-robot]

This is an automated cherry-pick of #827

Fix metrics component name for user-facing components. Also escape it.

[codecov]

Codecov Report

Merging #840 (eebe960) into release-1.5 (eebe960) will not change coverage.
The diff coverage is n/a.

❗ Current head eebe960 differs from pull request most recent head fc8fb04. Consider uploading reports for the commit fc8fb04 to get more accurate results

@@             Coverage Diff              @@
##           release-1.5     #840   +/-   ##
============================================
  Coverage        74.64%   74.64%           
============================================
  Files               38       38           
  Lines             2528     2528           
============================================
  Hits              1887     1887           
  Misses             577      577           
  Partials            64       64           

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[gab-satchi]

/retest

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

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