[ISSUE #5923] Revert "Fix tiered store README.md error about Configuration (#7436)"

[lizhimins]

[ISSUE #5923] Revert "Fix tiered store README.md error about Configuration (#7436)"

This reverts commit 70dc93a.

Which Issue(s) This PR Fixes

for issue #5923

There is a widely use of filePath in the rocketmq project. The rename operation which not only brings compatibility issues but also conflicts with the naming style of the rocketmq project. It is recommended to revert this change.

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (1be5ebc) 43.11% compared to head (0124da5) 43.17%.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #7557      +/-   ##
=============================================
+ Coverage      43.11%   43.17%   +0.05%     
- Complexity      9708     9719      +11     
=============================================
  Files           1159     1159              
  Lines          84035    84035              
  Branches       10922    10922              
=============================================
+ Hits           36234    36283      +49     
+ Misses         43294    43244      -50     
- Partials        4507     4508       +1     

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[lollipopjin]

LGTM， if we accept "filepath" as the default naming pattern, we should replace all the places in RocketMQ, not just tiered storage module.