fix(ci): disable Go caching to eliminate duplicate-restore errors

[hubcio]

Go coverage baseline produced 10+ "Cannot open: File exists"
annotations per run. Root cause: setup-go@v5 with cache:true
AND a manual actions/cache@v4 both restored to the same paths,
so the second restore failed on existing files.

Go builds are fast enough that caching is unnecessary. Replaced
the enabled/cache-dependency-path/golangci-lint-version inputs
with read-cache/save-cache (both default "false") for parity
with setup-rust-with-cache. Also disabled golangci-lint-action
caching in pre-merge to stop creating small stale entries.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.33%. Comparing base (33bee3d) to head (aae0005).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #2877   +/-   ##
=========================================
  Coverage     68.33%   68.33%           
  Complexity      739      739           
=========================================
  Files          1053     1053           
  Lines         84763    84763           
  Branches      61297    61308   +11     
=========================================
+ Hits          57923    57926    +3     
+ Misses        24468    24460    -8     
- Partials       2372     2377    +5     

Flag	Coverage Δ
csharp	67.47% <ø> (-0.15%)	⬇️
go	6.27% <ø> (ø)
java	54.83% <ø> (ø)
node	92.26% <ø> (-0.04%)	⬇️
python	81.57% <ø> (ø)
rust	70.03% <ø> (ø)

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see 14 files with indirect coverage changes

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