chore: migrate to v2 golangci-lint

Signed-off-by: Bence Csati <bence.csati@axoflow.com>

Author: csatib02

.golangci.yml

@@ -1,15 +1,39 @@
-linters-settings:
-    revive:
-        min-confidence: 0.9
-    gocyclo:
-        min-complexity: 15
+version: "2"
+run:
+  timeout: 10m
+  allow-parallel-runners: true
 
+formatters:
+  settings:
+    gci:
+      sections:
+        - standard
+        - default
+        - prefix(github.com/kube-logging/logging-operator)
+    goimports:
+      local-prefixes:
+        - github.com/kube-logging/logging-operator
+    gofmt:
+      simplify: true
+    gofumpt:
+      extra-rules: false
 
-issues:
-  exclude-dirs:
-    - .gen
-    - client
-  exclude:
-        - if block ends with a return statement, so drop this else and outdent its block (move short variable declaration to its own line if necessary)
-        - "`if` block ends with a `return` statement, so drop this `else` and outdent its block"
-        - "missing the call to method parallel"
+linters:
+  settings:
+    misspell:
+      locale: US
+    revive:
+      confidence: 0.9
+    gocyclo:
+      min-complexity: 15
+  enable:
+    - bodyclose
+    - errcheck
+    - ineffassign
+    - misspell
+    - nolintlint
+    - revive
+    - unconvert
+    - unparam
+    - unused
+    - whitespace

Makefile

@@ -8,7 +8,7 @@
 CONTROLLER_GEN_VERSION := 0.17.2
 
 # renovate: datasource=github-releases depName=golangci/golangci-lint versioning=semver
-GOLANGCI_LINT_VERSION := 1.64.8
+GOLANGCI_LINT_VERSION := 2.0.2
 
 # renovate: datasource=go depName=github.com/vladopajic/go-test-coverage/v2 versioning=semver
 GO_TEST_COVERAGE_VERSION := 2.13.0
@@ -284,7 +284,7 @@ ${ENVTEST_BINARY_ASSETS}_${ENVTEST_K8S_VERSION}: | ${SETUP_ENVTEST} ${ENVTEST_BI
 ${GOLANGCI_LINT}: ${GOLANGCI_LINT}_${GOLANGCI_LINT_VERSION}_${GOVERSION} | ${BIN}
 	ln -sf $(notdir $<) $@
 
-${GOLANGCI_LINT}_${GOLANGCI_LINT_VERSION}_${GOVERSION}: IMPORT_PATH := github.com/golangci/golangci-lint/cmd/golangci-lint
+${GOLANGCI_LINT}_${GOLANGCI_LINT_VERSION}_${GOVERSION}: IMPORT_PATH := github.com/golangci/golangci-lint/v2/cmd/golangci-lint
 ${GOLANGCI_LINT}_${GOLANGCI_LINT_VERSION}_${GOVERSION}: VERSION := v${GOLANGCI_LINT_VERSION}
 ${GOLANGCI_LINT}_${GOLANGCI_LINT_VERSION}_${GOVERSION}: | ${BIN}
 	${go_install_binary}