ci: update golangci-lint to 1.47.0

[michaelbeaumont]

At the moment ^1.47.1 and 1.48.0 lead to getting OOM killed so we'll stick with 1.47.0 for now.

Checklist prior to review

• Link to docs PR or issue --
• Link to UI issue or PR --
• Is the issue worked on linked? --
• The PR does not hardcode values that might break projects that depend on kuma (e.g. "kumahq" as a image registry) --
• The PR will work for both Linux and Windows, system specific functions like syscall.Mkfifo have equivalent implementation on the other OS --
• Unit Tests --
• E2E Tests --
• Manual Universal Tests --
• Manual Kubernetes Tests --
• Do you need to update UPGRADE.md? --
• Does it need to be backported according to the backporting policy? --

[codecov-commenter]

Codecov Report

Merging #4830 (69a85f1) into master (7d4c440) will increase coverage by 0.00%.
The diff coverage is 51.61%.

@@           Coverage Diff           @@
##           master    #4830   +/-   ##
=======================================
  Coverage   46.43%   46.44%           
=======================================
  Files         690      690           
  Lines       47141    47141           
=======================================
+ Hits        21891    21893    +2     
  Misses      23330    23330           
+ Partials     1920     1918    -2     

Impacted Files	Coverage Δ
app/cni/pkg/cni/injector_linux.go	0.00% <ø> (ø)
app/kuma-dp/pkg/dataplane/metrics/server.go	9.52% <0.00%> (-0.24%)	⬇️
...p/kumactl/cmd/install/install_transparent_proxy.go	82.66% <ø> (ø)
pkg/config/display.go	0.00% <0.00%> (ø)
...ore/resources/apis/mesh/gateway_route_validator.go	96.17% <ø> (ø)
pkg/envoy/admin/client.go	0.00% <0.00%> (ø)
...ns/runtime/k8s/controllers/cni_taint_controller.go	0.00% <0.00%> (ø)
pkg/xds/envoy/listeners/v3/dns_configurer.go	94.33% <ø> (ø)
pkg/xds/sync/dataplane_watchdog.go	0.00% <0.00%> (ø)
app/cni/pkg/install/main.go	6.99% <50.00%> (ø)
... and 10 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

[slonka]

Left a bunch of questions :)