Pin github.com/mitchellh/mapstructure to v1.5.0

[sky333999]

Description of the issue

With OTel upgrade to v0.84.0, it also upgraded mapstructure to v1.5.1 that brings along a change in behavior where empty slices overwrite the OTel defaults that would have been used when unmarshalling from yaml.
An example is where the yaml generated via config translation typically has service->telemetry->logs->output_paths set to [] and when initializing the OTel collector, the default is ["stderr"].
Post this change, the [] would overwrite the default ["stderr"] thus discarding all logs.

As an example, unmarshalling the following into an OTel.Config with v1.5.0 results in output_paths being set to the default i.e. ["stderr"]. But doing the same with v1.5.1 results in output_paths being set to [].

service:
  telemetry:
    logs:
      output_paths: []
      encoding: console

Description of changes

Pinning mapstructure to the prior version. No major changes between v1.5.0 and v1.5.1

License

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

Tests

• Built images with latest main prior and after this change. I noticed no OTel logging before and I see the logs after.

Requirements

Before commit the code, please do the following steps.

1. Run make fmt and make fmt-sh
2. Run make lint

[codecov-commenter]

Codecov Report

Attention: 37 lines in your changes are missing coverage. Please review.

Comparison is base (96d4763) 57.58% compared to head (bd595a7) 62.44%.
Report is 410 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #872      +/-   ##
==========================================
+ Coverage   57.58%   62.44%   +4.85%     
==========================================
  Files         370      339      -31     
  Lines       17548    17105     -443     
==========================================
+ Hits        10105    10681     +576     
+ Misses       6848     5871     -977     
+ Partials      595      553      -42     

Files	Coverage Δ
cfg/commonconfig/commonconfig.go	8.00% <ø> (ø)
...md/amazon-cloudwatch-agent-config-wizard/wizard.go	59.55% <ø> (-8.51%)	⬇️
...amazon-cloudwatch-agent/amazon-cloudwatch-agent.go	2.68% <ø> (ø)
...oudwatch-agent/register_event_logger_notwindows.go	0.00% <ø> (ø)
...-cloudwatch-agent/register_event_logger_windows.go	0.00% <ø> (ø)
cmd/config-translator/translator.go	0.00% <ø> (ø)
cmd/xray-migration/commands_unix.go	42.50% <ø> (ø)
cmd/xray-migration/commands_windows.go	42.50% <ø> (ø)
cmd/xray-migration/xray-migration.go	30.28% <ø> (ø)
handlers/agentinfo/info.go	84.94% <ø> (ø)
... and 22 more

... and 206 files with indirect coverage changes

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