* chore(cmd/cli): Reduce cyclomatic complexity of uninstall command (#4825)

* chore(cmd/cli): Reduce cyclomatic complexity of uninstall command

Separate code into functions to reduce the cyclomatic complexity
And adds unit tests to functions created
Helps unblock #4555

Signed-off-by: Shalier Xia <shalierxia@microsoft.com>
(cherry picked from commit d5d3a25)

* Golang errors pkg (#4904)

This PR partially resolves #4524

* Removes "github.com/pkg/errors" package from the repo
* Wrap errors wherever possible rather than using the string format of the error as part of the message

Signed-off-by: Allen Leigh <allenlsy@gmail.com>
(cherry picked from commit 8030047)

* fix golints and security scan issues (#4915)

fix golints and security for:

1. G112 (ReadHeaderTimeout)
2. prometheus client_go version pinned to bad version

Signed-off-by: Sean Teeling <seanteeling@microsoft.com>

(cherry picked from commit f768f64)

* Fix lints by removing superfluous var type from var instantiation (#4917)

Remove unnecessary var types during instantiation to fix lints

Signed-off-by: Sean Teeling <seanteeling@microsoft.com>
(cherry picked from commit 9e9f712)

Co-authored-by: Shalier Xia <69616256+shalier@users.noreply.github.com>
Co-authored-by: allenlsy <allenlsy@gmail.com>
Co-authored-by: steeling <seanteeling@microsoft.com>