Feat: support multi policies

[Somefive]

Description of your changes

This PR will allow users to add multiple same typed resource policies, including apply-once, garbage-collect, shard-resource, read-only, take-over. Previously, for each type of these policies, at most one such typed policy can be handled. But in the case there are various resource rules to be clarified in the policy, they might be grouped in different policies and therefore, this PR supports using multiple same typed policies, like adding two garbage-collect policy, one saying PVCs do not need to be recycled and the other saying ConfigMaps should be reserved until application deleted.

P.S. This PR fixes the incorrect cue definition for several types of policies.

I have:

• Read and followed KubeVela's contribution process.
• Related Docs updated properly. In a new feature or configuration option, an update to the documentation is necessary.
• Run make reviewable to ensure this PR is ready for review.
• Added backport release-x.y labels to auto-backport this PR if necessary.

How has this code been tested

Special notes for your reviewer

[codecov]

Codecov Report

Patch coverage: 82.22% and project coverage change: +0.08 🎉

Comparison is base (b4e499b) 60.45% compared to head (301a7cc) 60.54%.

❗ Current head 301a7cc differs from pull request most recent head 5ce16dd. Consider uploading reports for the commit 5ce16dd to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5811      +/-   ##
==========================================
+ Coverage   60.45%   60.54%   +0.08%     
==========================================
  Files         224      224              
  Lines       31124    31162      +38     
==========================================
+ Hits        18816    18867      +51     
+ Misses      10529    10524       -5     
+ Partials     1779     1771       -8     

Flag	Coverage Δ
core-unittests	55.69% <82.22%> (-0.05%)	⬇️
e2e-multicluster-test	24.77% <51.11%> (+0.10%)	⬆️
e2etests	25.22% <31.11%> (+0.06%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/policy/common.go	80.85% <82.22%> (-19.15%)	⬇️

... and 12 files with indirect coverage changes

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