✨ [minor] Support verifying bundle of components in staging env

[Pohfy123]

What's the change or impact of this PR?:

• Support running a bundle of components as a same queue in staging environment
• Support bundle configuration e.g.

apiVersion: env.samsahai.io/v1beta1
kind: Config
metadata:
  name: example
spec:
  ...
  bundles
    - redis
    - mariadb

Related issue link:

[codecov]

Codecov Report

Merging #37 into master will increase coverage by 0.02%.
The diff coverage is 71.18%.

@@            Coverage Diff             @@
##           master      #37      +/-   ##
==========================================
+ Coverage   66.41%   66.44%   +0.02%     
==========================================
  Files          79       79              
  Lines        7343     7509     +166     
==========================================
+ Hits         4877     4989     +112     
- Misses       1910     1953      +43     
- Partials      556      567      +11