Remove timeout logic from ReadRaw functions and add ReadRawWithContext (#18708)

Removing the timeout logic from raw-response functions and adding documentation comments. The following functions are affected:

- `ReadRaw`
- `ReadRawWithContext` (newly added)
- `ReadRawWithData`
- `ReadRawWithDataWithContext`

The previous logic of using `ctx, _ = c.c.withConfiguredTimeout(ctx)` could cause a potential [context leak](https://pkg.go.dev/context):

> Failing to call the CancelFunc leaks the child and its children until the parent is canceled or the timer fires. The go vet tool checks that CancelFuncs are used on all control-flow paths.

Cancelling the context would have caused more issues since the context would be cancelled before the request body is closed.

Resolves: #18658

command/read.go

@@ -1,6 +1,7 @@
 package command
 
 import (
+	"context"
 	"fmt"
 	"io"
 	"os"
@@ -77,6 +78,10 @@ func (c *ReadCommand) Run(args []string) int {
 		return 2
 	}
 
+	// client.ReadRaw* methods require a manual timeout override
+	ctx, cancel := context.WithTimeout(context.Background(), client.ClientTimeout())
+	defer cancel()
+
 	// Pull our fake stdin if needed
 	stdin := (io.Reader)(os.Stdin)
 	if c.testStdin != nil {
@@ -92,7 +97,7 @@ func (c *ReadCommand) Run(args []string) int {
 	}
 
 	if Format(c.UI) != "raw" {
-		secret, err := client.Logical().ReadWithData(path, data)
+		secret, err := client.Logical().ReadWithDataWithContext(ctx, path, data)
 		if err != nil {
 			c.UI.Error(fmt.Sprintf("Error reading %s: %s", path, err))
 			return 2
@@ -109,7 +114,7 @@ func (c *ReadCommand) Run(args []string) int {
 		return OutputSecret(c.UI, secret)
 	}
 
-	resp, err := client.Logical().ReadRawWithData(path, data)
+	resp, err := client.Logical().ReadRawWithDataWithContext(ctx, path, data)
 	if err != nil {
 		c.UI.Error(fmt.Sprintf("Error reading: %s: %s", path, err))
 		return 2