fix: set put mode to overwrite in mount backend

[ion-elgreco]

Description

Put opts were getting passed create always, but in mount storage we have to use overwrite mode always.

Related Issue(s)

• closes writing to blobfuse has stopped working in 0.19.2 #2860

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 72.48%. Comparing base (3127c81) to head (1b9322b).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/mount/src/file.rs	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2861      +/-   ##
==========================================
- Coverage   72.51%   72.48%   -0.03%     
==========================================
  Files         132      132              
  Lines       40046    40049       +3     
  Branches    40046    40049       +3     
==========================================
- Hits        29038    29029       -9     
- Misses       9156     9162       +6     
- Partials     1852     1858       +6     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.