Move evergreen file for kubectl plugin to root of the project

1. Since most of our evergreen config files are in root of the repo and now that kubectl plugin
is also moved to `cmd/` it makes sense to move the evergreen config file to the root of repo
with correct name.
2. Change the goreleaser config file to version 1. We upgraded it temporarily to  version 2
but CI complains that only version 1 is supported.

Author: viveksinghggits

public/.evergreen.yml renamed to .evergreen-kubectlplugin.yml

@@ -45,7 +45,7 @@ functions:
     - command: shell.exec
       type: setup
       params:
-        working_dir: src/github.com/mongodb/mongodb-kubernetes/public/tools/multicluster
+        working_dir: src/github.com/mongodb/mongodb-kubernetes
         include_expansions_in_env:
           - GRS_USERNAME
           - GRS_PASSWORD

.goreleaser.yaml

@@ -1,5 +1,4 @@
 project_name: kubectl-mongodb
-version: 2
 
 before:
   hooks:
@@ -43,7 +42,7 @@ checksum:
 snapshot:
   name_template: "{{ incpatch .Version }}-next"
 changelog:
-  disable: true
+  skip: true
 
 release:
   prerelease: auto