Support --app-manifest-cache-count on helm chart

[ffjlabo]

What this PR does / why we need it:

as title

Which issue(s) this PR fixes:

Fixes #5141 Follow #5108

Does this PR introduce a user-facing change?:

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 22.80%. Comparing base (614e054) to head (1d4ece0). Report is 124 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #5142 +/- ## ======================================= Coverage 22.80% 22.80% ======================================= Files 412 412 Lines 43827 43827 ======================================= Hits 9996 9996 Misses 33044 33044 Partials 787 787 ```

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