Fix Script Error and Enhance Code Robustness and Details

[cubxxw]

This Pull Request introduces several improvements and fixes to the existing script, addressing an error that was previously causing the script to fail under certain conditions. Below is a detailed overview of the changes made:

1. Error Resolution: The main focus of this PR is to fix a critical issue where the script would throw an error due to improper handling of trailing commas in the MSG_TRANSFER_PROM_PORTS array elements. This was resolved by implementing a string manipulation technique to strip any trailing commas from the array elements before they are used in the PROMETHEUS_PORT_OPTION variable.

2. Code Robustness: To ensure the script's long-term reliability, we've added checks to verify the number of MSG_TRANSFER_PROM_PORTS matches the expected OPENIM_MSGGATEWAY_NUM, preventing mismatch errors that could lead to unexpected behavior.

3. Detail Improvements: Several minor code detail enhancements were made, including code style consistency adjustments for better readability and maintainability. Additionally, we've refined the log output for clearer and more informative messages regarding the script's execution process.

4. Documentation Updates: Accompanying these changes, inline comments and documentation were updated to reflect the rationale behind key decisions and to guide future contributors in understanding the script's functionality.

CICD Verity:

 Started processes:
Process /home/runner/work/open-im-server/open-im-server/_output/bin/platforms/linux/amd64/openim-msgtransfer - Command: /home/runner/work/open-im-server/open-im-server/_output/bin/platforms/linux/amd64/openim-msgtransfer --prometheus_port 21400 -c /home/runner/work/open-im-server/open-im-server/config/ -n 0, PID: 19512, Port: 21400, Start time: Tue Feb  6 02:56:04 2024
Process /home/runner/work/open-im-server/open-im-server/_output/bin/platforms/linux/amd64/openim-msgtransfer - Command: /home/runner/work/open-im-server/open-im-server/_output/bin/platforms/linux/amd64/openim-msgtransfer --prometheus_port 21401 -c /home/runner/work/open-im-server/open-im-server/config/ -n 1, PID: 19537, Port: 21401, Start time: Tue Feb  6 02:56:04 2024
Process /home/runner/work/open-im-server/open-im-server/_output/bin/platforms/linux/amd64/openim-msgtransfer - Command: /home/runner/work/open-im-server/open-im-server/_output/bin/platforms/linux/amd64/openim-msgtransfer --prometheus_port 21402 -c /home/runner/work/open-im-server/open-im-server/config/ -n 2, PID: 19562, Port: 21402, Start time: Tue Feb  6 02:56:04 2024
Process /home/runner/work/open-im-server/open-im-server/_output/bin/platforms/linux/amd64/openim-msgtransfer - Command: /home/runner/work/open-im-server/open-im-server/_output/bin/platforms/linux/amd64/openim-msgtransfer --prometheus_port 21403 -c /home/runner/work/open-im-server/open-im-server/config/ -n 3, PID: 19588, Port: 21403, Start time: Tue Feb  6 02:56:04 2024

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (3138193) 5.32% compared to head (592b358) 5.32%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
pkg/common/config/parse.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #1890   +/-   ##
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  Coverage   5.32%   5.32%           
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  Files         43      43           
  Lines       3830    3830           
=====================================
  Hits         204     204           
  Misses      3613    3613           
  Partials      13      13           

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