negative add-constant report when expr is not **ast.Ident**

[lsytj0413]

Describe the bug
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To Reproduce
Steps to reproduce the behavior:

1. I updated revive go install github.com/mgechev/revive@latest
2. I run it with the following flags & configuration file:

package main

import (
	"context"
	"log/slog"
)

func main() {
	slog.Default().InfoContext(context.Background(), "key1")
	slog.Default().InfoContext(context.Background(), "key1")
	slog.Default().InfoContext(context.Background(), "key1")
	slog.Default().InfoContext(context.Background(), "key1")

	slog.InfoContext(context.Background(), "key2")
	slog.InfoContext(context.Background(), "key2")
	slog.InfoContext(context.Background(), "key2")
	slog.InfoContext(context.Background(), "key2")
}

# flags
golangci-lint run

linters:
  enable:
    - revive

linters-settings:
  revive:
    enable-all-rules: true
    rules:
      - name: add-constant
        severity: warning
        disabled: false
        arguments:
          - maxLitCount: "3"
            ignoreFuncs: 'slog\.*,fmt\.*,InfoContext\.*'

Expected behavior
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It didn't report "key1" for add-constant.

Logs
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main.go:12:51: add-constant: string literal "key1" appears, at least, 4 times, create a named constant for it (revive)
        slog.Default().InfoContext(context.Background(), "key1")

Desktop (please complete the following information):

• OS: [e.g. Ubuntu 18.04]
• Version of Go
  go version go1.22.2 darwin/arm64
  golangci-lint has version v1.59.0 built with go1.22.2 from (unknown, modified: ?, mod sum: "h1:st69YDnAH/v2QXDcgUaZ0seQajHScPALBVkyitYLXEk=") on (unknown)

Additional context
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