Fix Amazon S3 storage not work

[ninjadq]

The Chartmuseum S3 client need set an Env variable
Ref: helm/chartmuseum#280

Signed-off-by: DQ dengq@vmware.com

[codecov]

Codecov Report

Merging #12357 into master will increase coverage by 0.09%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #12357      +/-   ##
==========================================
+ Coverage   56.02%   56.11%   +0.09%     
==========================================
  Files         942      945       +3     
  Lines       54403    54538     +135     
  Branches     1798     1798              
==========================================
+ Hits        30480    30606     +126     
- Misses      20465    20471       +6     
- Partials     3458     3461       +3     

Flag	Coverage Δ
#unittests	56.11% <ø> (+0.09%)	⬆️

Impacted Files	Coverage Δ
....com/goharbor/harbor/src/common/utils/passports.go	86.36% <0.00%> (-4.55%)	⬇️
...ortal/src/lib/components/config/gc/gc.component.ts	58.73% <0.00%> (-3.18%)	⬇️
....com/goharbor/harbor/src/lib/selector/candidate.go	57.14% <0.00%> (ø)
...or/src/lib/selector/selectors/severity/selector.go	93.54% <0.00%> (ø)
...r/src/lib/selector/selectors/signature/selector.go	100.00% <0.00%> (ø)
...harbor/harbor/src/pkg/p2p/preheat/policy/filter.go	81.81% <0.00%> (ø)
.../src/lib/selector/selectors/doublestar/selector.go	77.02% <0.00%> (+0.97%)	⬆️
...com/goharbor/harbor/src/jobservice/runner/redis.go	67.67% <0.00%> (+4.04%)	⬆️
...arbor/src/lib/selector/selectors/label/selector.go	100.00% <0.00%> (+30.43%)	⬆️