refactor(operator): refactor Chaos type and PodChaos reconciliation

[mlycore]

Type of change:

• Bugfix
• New feature provided
• Improve performance
• Backport patches
• Refactor

What this PR does / why we need it:

Pre-submission checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?

[codecov-commenter]

Codecov Report

Merging #401 (70e21a2) into main (e52f093) will decrease coverage by 8.81%.
The diff coverage is 9.80%.

@@            Coverage Diff             @@
##             main     #401      +/-   ##
==========================================
- Coverage   47.34%   38.53%   -8.81%     
==========================================
  Files          48       51       +3     
  Lines        5264     6269    +1005     
==========================================
- Hits         2492     2416      -76     
- Misses       2547     3634    +1087     
+ Partials      225      219       -6     

Impacted Files	Coverage Δ
pitr/agent/internal/handler/backup.go	15.00% <ø> (ø)
pitr/agent/internal/handler/restore.go	0.00% <ø> (ø)
pitr/agent/internal/handler/show.go	0.00% <ø> (ø)
pitr/agent/internal/pkg/opengauss.go	3.93% <ø> (ø)
pitr/agent/internal/pkg/pkg.go	0.00% <ø> (ø)
pitr/agent/pkg/cmds/cmd.go	49.46% <ø> (ø)
pitr/agent/pkg/gsutil/conn.go	29.41% <ø> (ø)
pitr/agent/pkg/strutil/rand_string.go	90.90% <ø> (ø)
pitr/agent/pkg/xerror/error.go	61.53% <ø> (ø)
pitr/cli/internal/cmd/backup.go	73.47% <0.00%> (ø)
... and 26 more

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication

[mlycore]

ref #290