fix: Incorrect conversion between integer types

[Xunzhuo]

Signed-off-by: Xunzhuo [email protected]

What this PR does:

Incorrect conversion of an integer with architecture-dependent bit size from strconv.Atoi to a lower bit size type int32 without an upper bound check.

[codecov]

Codecov Report

Base: 60.56% // Head: 60.56% // No change to project coverage 👍

Coverage data is based on head (8bc1048) compared to base (5f65f47).
Patch coverage: 100.00% of modified lines in pull request are covered.

❗ Current head 8bc1048 differs from pull request most recent head fbf236a. Consider uploading reports for the commit fbf236a to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #789   +/-   ##
=======================================
  Coverage   60.56%   60.56%           
=======================================
  Files         133      133           
  Lines        8340     8340           
=======================================
  Hits         5051     5051           
  Misses       2712     2712           
  Partials      577      577           

Impacted Files	Coverage Δ
components/rpc/invoker/mosn/mosninvoker.go	72.72% <100.00%> (ø)

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[seeflood]

lgtm. Thanks!