[chore] enable modernize linter (#14153)

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#### Description

This PR enables the
[modernize](https://golangci-lint.run/docs/linters/configuration/#modernize)
linter.

Example of a linter error:

```sh
confmap/internal/decoder.go:171:59: reflecttypefor: reflect.TypeOf call can be simplified using TypeFor (modernize)
		fieldNameSet := reflect.MakeMap(reflect.MapOf(to.Key(), reflect.TypeOf(true)))
```

Signed-off-by: Paulo Dias <[email protected]>

Author: paulojmdias

.golangci.yml

@@ -38,6 +38,7 @@ linters:
     - gosec
     - govet
     - misspell
+    - modernize
     - nolintlint
     - perfsprint
     - revive
@@ -55,7 +56,7 @@ linters:
     presets:
       - std-error-handling
 
-    # Excluding configuration per-path, per-linter, per-text and per-source  
+    # Excluding configuration per-path, per-linter, per-text and per-source
     rules: []
 
     # Log a warning if an exclusion rule is unused.
@@ -76,7 +77,7 @@ linters:
             - pkg: "math/rand$"
               desc: "Use the newer 'math/rand/v2' instead of math/rand"
             - pkg: "sigs.k8s.io/yaml"
-              desc: "Use 'go.yaml.in/yaml' instead of sigs.k8s.io/yaml"  
+              desc: "Use 'go.yaml.in/yaml' instead of sigs.k8s.io/yaml"
         # Add a different guard rule so that we can ignore tests.
         ignore-in-test:
           # Allow in tests for testing pdata or other receivers/exporters that expect OTLP.