feat: wrap watch.namespaces helm template check in a with block

[cnvergence]

What type of PR is this?

What this PR does / why we need it:
Wrapping the check in a with block as suggested in the issue #9064

Which issue(s) this PR fixes:

Fixes #

Release Notes: Yes/No

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.82%. Comparing base (42eba71) to head (481d9a0).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9067      +/-   ##
==========================================
+ Coverage   74.76%   74.82%   +0.05%     
==========================================
  Files         252      252              
  Lines       40571    40571              
==========================================
+ Hits        30333    30357      +24     
+ Misses       8167     8145      -22     
+ Partials     2071     2069       -2     

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