【WebUI】Fix errors raised by linter

[196Ikuchil]

What type of PR is this?

/area web

What this PR does / why we need it:

Linter raised errors about unknown type assertions like below.

[13:26:01]  ERROR  ERROR in components/lib/template.ts:15:5
TS2322: Type 'unknown' is not assignable to type 'V1Pod'.
    13 |   if (process.env.POD_TEMPLATE) {
    14 |     const temp = yaml.load(process.env.POD_TEMPLATE);
  > 15 |     return temp;
       |     ^^^^^^^^^^^^
    16 |   }
    17 |   return {};
    18 | };

Added to specify the type

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

/label tide/merge-method-squash

[sanposhiho]

/assign

[sanposhiho]

/lgtm
/approve

❤️

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: 196Ikuchil, sanposhiho

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