[Fix] file service discovery path can run in windows

[cityiron]

What this PR does:
Windows run fail because the path is "/" and the filename contains "." or ":" ..., I use filePath replace path, replace some special character.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov-io]

Codecov Report

Merging #932 (cc7fb2e) into develop (1f708d7) will decrease coverage by 0.07%.
The diff coverage is 48.57%.

@@             Coverage Diff             @@
##           develop     #932      +/-   ##
===========================================
- Coverage    59.95%   59.87%   -0.08%     
===========================================
  Files          260      261       +1     
  Lines        12855    12937      +82     
===========================================
+ Hits          7707     7746      +39     
- Misses        4188     4233      +45     
+ Partials       960      958       -2     

Impacted Files	Coverage Δ
config_center/file/impl.go	50.40% <47.05%> (-2.07%)	⬇️
registry/file/service_discovery.go	45.74% <100.00%> (ø)
metadata/definition/mock.go	0.00% <0.00%> (-25.00%)	⬇️
config/config_loader.go	40.95% <0.00%> (-12.77%)	⬇️
config/service_config.go	55.03% <0.00%> (-7.65%)	⬇️
cluster/router/chain/chain.go	69.04% <0.00%> (-1.59%)	⬇️
remoting/getty/pool.go	68.72% <0.00%> (-0.89%)	⬇️
registry/protocol/protocol.go	76.96% <0.00%> (-0.88%)	⬇️
common/proxy/proxy.go	88.46% <0.00%> (-0.86%)	⬇️
registry/nacos/service_discovery.go	64.13% <0.00%> (-0.45%)	⬇️
... and 23 more

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[cityiron]

张训 help test in windows successful.